165428907 has 16 divisors (see below), whose sum is σ = 253135872. Its totient is φ = 94135680.

The previous prime is 165428897. The next prime is 165428929. The reversal of 165428907 is 709824561.

It is not a de Polignac number, because 165428907 - 2⁷ = 165428779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165428947) 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 15 ways as a sum of consecutive naturals, for example, 11283 + ... + 21404.

It is an arithmetic number, because the mean of its divisors is an integer number (15820992).

Almost surely, 2^165428907 is an apocalyptic number.

165428907 is a deficient number, since it is larger than the sum of its proper divisors (87706965).

165428907 is a wasteful number, since it uses less digits than its factorization.

165428907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32938.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 165428907 is about 12861.9169255597. The cubic root of 165428907 is about 548.9554908989.

The spelling of 165428907 in words is "one hundred sixty-five million, four hundred twenty-eight thousand, nine hundred seven".