165924013 has 2 divisors, whose sum is σ = 165924014. Its totient is φ = 165924012.

The previous prime is 165923999. The next prime is 165924041. The reversal of 165924013 is 310429561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108118404 + 57805609 = 10398^2 + 7603^2 .

It is a cyclic number.

It is not a de Polignac number, because 165924013 - 2⁵ = 165923981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165924043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82962006 + 82962007.

It is an arithmetic number, because the mean of its divisors is an integer number (82962007).

Almost surely, 2^165924013 is an apocalyptic number.

It is an amenable number.

165924013 is a deficient number, since it is larger than the sum of its proper divisors (1).

165924013 is an equidigital number, since it uses as much as digits as its factorization.

165924013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 165924013 is about 12881.1495216848. The cubic root of 165924013 is about 549.5025949241.

The spelling of 165924013 in words is "one hundred sixty-five million, nine hundred twenty-four thousand, thirteen".