9947469169 has 9 divisors (see below), whose sum is σ = 10935201081. Its totient is φ = 9042156420.

The previous prime is 9947469167. The next prime is 9947469211. The reversal of 9947469169 is 9619647499.

It is a happy number.

The square root of 9947469169 is 99737.

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

It is not a de Polignac number, because 9947469169 - 2¹ = 9947469167 is a prime.

It is a super-2 number, since 2×9947469169² (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 9947469169.

It is not an unprimeable number, because it can be changed into a prime (9947469167) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1092574 + ... + 1101640.

Almost surely, 2^9947469169 is an apocalyptic number.

9947469169 is the 99737-th square number.

9947469169 is the 49869-th centered octagonal number.

It is an amenable number.

9947469169 is a deficient number, since it is larger than the sum of its proper divisors (987731912).

9947469169 is an frugal number, since it uses more digits than its factorization.

9947469169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18156 (or 9078 counting only the distinct ones).

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

The cubic root of 9947469169 is about 2150.6555901582.

Multiplying 9947469169 by its sum of digits (64), we get a square (636638026816 = 797896²).

The spelling of 9947469169 in words is "nine billion, nine hundred forty-seven million, four hundred sixty-nine thousand, one hundred sixty-nine".