9897663169 has 3 divisors (see below), whose sum is σ = 9897762657. Its totient is φ = 9897563682.

The previous prime is 9897663137. The next prime is 9897663187. The reversal of 9897663169 is 9613667989.

The square root of 9897663169 is 99487.

It is a perfect power (a square), and thus also a powerful number.

9897663169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9613667989 = 2693 ⋅3569873.

It is not a de Polignac number, because 9897663169 - 2⁵ = 9897663137 is a prime.

It is a super-2 number, since 2×9897663169² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9897663169.

It is not an unprimeable number, because it can be changed into a prime (9892663169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 49744 + ... + 149230.

It is an arithmetic number, because the mean of its divisors is an integer number (3299254219).

Almost surely, 2^9897663169 is an apocalyptic number.

9897663169 is the 99487-th square number.

9897663169 is the 49744-th centered octagonal number.

It is an amenable number.

9897663169 is a deficient number, since it is larger than the sum of its proper divisors (99488).

9897663169 is an frugal number, since it uses more digits than its factorization.

9897663169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198974 (or 99487 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 64.

The cubic root of 9897663169 is about 2147.0602092029.

Multiplying 9897663169 by its sum of digits (64), we get a square (633450442816 = 795896²).

The spelling of 9897663169 in words is "nine billion, eight hundred ninety-seven million, six hundred sixty-three thousand, one hundred sixty-nine".