169128963 has 24 divisors (see below), whose sum is σ = 253793280. Its totient is φ = 108416880.

The previous prime is 169128941. The next prime is 169128997. The reversal of 169128963 is 369821961.

It is a happy number.

It is not a de Polignac number, because 169128963 - 2⁹ = 169128451 is a prime.

It is a super-2 number, since 2×169128963² = 57209212250910738, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (169128863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43618 + ... + 47336.

It is an arithmetic number, because the mean of its divisors is an integer number (10574720).

Almost surely, 2^169128963 is an apocalyptic number.

169128963 is a deficient number, since it is larger than the sum of its proper divisors (84664317).

169128963 is a wasteful number, since it uses less digits than its factorization.

169128963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919 (or 3916 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 169128963 is about 13004.9591694861. The cubic root of 169128963 is about 553.0180782316.

The spelling of 169128963 in words is "one hundred sixty-nine million, one hundred twenty-eight thousand, nine hundred sixty-three".