9997456281 has 4 divisors (see below), whose sum is σ = 13329941712. Its totient is φ = 6664970852.

The previous prime is 9997456247. The next prime is 9997456291. The reversal of 9997456281 is 1826547999.

9997456281 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9997456281 - 2⁷ = 9997456153 is a prime.

It is a super-2 number, since 2×9997456281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9997456291) 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 3 ways as a sum of consecutive naturals, for example, 1666242711 + ... + 1666242716.

It is an arithmetic number, because the mean of its divisors is an integer number (3332485428).

Almost surely, 2^9997456281 is an apocalyptic number.

It is an amenable number.

9997456281 is a deficient number, since it is larger than the sum of its proper divisors (3332485431).

9997456281 is a wasteful number, since it uses less digits than its factorization.

9997456281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332485430.

The product of its digits is 9797760, while the sum is 60.

The square root of 9997456281 is about 99987.2805960838. The cubic root of 9997456281 is about 2154.2519986586.

The spelling of 9997456281 in words is "nine billion, nine hundred ninety-seven million, four hundred fifty-six thousand, two hundred eighty-one".