165405373 has 8 divisors (see below), whose sum is σ = 189117248. Its totient is φ = 141714144.

The previous prime is 165405353. The next prime is 165405403. The reversal of 165405373 is 373504561.

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 165405373 - 2²⁵ = 131850941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165405313) 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, 20590 + ... + 27472.

It is an arithmetic number, because the mean of its divisors is an integer number (23639656).

Almost surely, 2^165405373 is an apocalyptic number.

It is an amenable number.

165405373 is a deficient number, since it is larger than the sum of its proper divisors (23711875).

165405373 is an equidigital number, since it uses as much as digits as its factorization.

165405373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10323.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 165405373 is about 12861.0020216156. The cubic root of 165405373 is about 548.9294581025.

The spelling of 165405373 in words is "one hundred sixty-five million, four hundred five thousand, three hundred seventy-three".