390165157 has 4 divisors (see below), whose sum is σ = 393618060. Its totient is φ = 386712256.

The previous prime is 390165131. The next prime is 390165179. The reversal of 390165157 is 751561093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751561093 = 19 ⋅39555847.

It can be written as a sum of positive squares in 2 ways, for example, as 215766721 + 174398436 = 14689^2 + 13206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390165157 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 (390165107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1726282 + ... + 1726507.

It is an arithmetic number, because the mean of its divisors is an integer number (98404515).

Almost surely, 2^390165157 is an apocalyptic number.

It is an amenable number.

390165157 is a deficient number, since it is larger than the sum of its proper divisors (3452903).

390165157 is a wasteful number, since it uses less digits than its factorization.

390165157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452902.

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 390165157 is about 19752.5987404189. The cubic root of 390165157 is about 730.7174762492.

The spelling of 390165157 in words is "three hundred ninety million, one hundred sixty-five thousand, one hundred fifty-seven".