165939937 has 8 divisors (see below), whose sum is σ = 167932800. Its totient is φ = 163953024.

The previous prime is 165939929. The next prime is 165939971. The reversal of 165939937 is 739939561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165939937 - 2³ = 165939929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165919937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80364 + ... + 82402.

It is an arithmetic number, because the mean of its divisors is an integer number (20991600).

Almost surely, 2^165939937 is an apocalyptic number.

It is an amenable number.

165939937 is a deficient number, since it is larger than the sum of its proper divisors (1992863).

165939937 is an equidigital number, since it uses as much as digits as its factorization.

165939937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975.

The product of its digits is 1377810, while the sum is 52.

The square root of 165939937 is about 12881.7676193914. The cubic root of 165939937 is about 549.5201732505.

The spelling of 165939937 in words is "one hundred sixty-five million, nine hundred thirty-nine thousand, nine hundred thirty-seven".