165628013 has 2 divisors, whose sum is σ = 165628014. Its totient is φ = 165628012.

The previous prime is 165627941. The next prime is 165628027. The reversal of 165628013 is 310826561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133217764 + 32410249 = 11542^2 + 5693^2 .

It is a cyclic number.

It is not a de Polignac number, because 165628013 - 2⁸ = 165627757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165628033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82814006 + 82814007.

It is an arithmetic number, because the mean of its divisors is an integer number (82814007).

Almost surely, 2^165628013 is an apocalyptic number.

It is an amenable number.

165628013 is a deficient number, since it is larger than the sum of its proper divisors (1).

165628013 is an equidigital number, since it uses as much as digits as its factorization.

165628013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 165628013 is about 12869.6547350735. The cubic root of 165628013 is about 549.1756388624.

The spelling of 165628013 in words is "one hundred sixty-five million, six hundred twenty-eight thousand, thirteen".