165456913 has 2 divisors, whose sum is σ = 165456914. Its totient is φ = 165456912.

The previous prime is 165456881. The next prime is 165456953. The reversal of 165456913 is 319654561.

It is a happy number.

It is an a-pointer prime, because the next prime (165456953) can be obtained adding 165456913 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165456769 + 144 = 12863^2 + 12^2 .

It is a cyclic number.

It is not a de Polignac number, because 165456913 - 2⁵ = 165456881 is a prime.

It is not a weakly prime, because it can be changed into another prime (165456953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82728456 + 82728457.

It is an arithmetic number, because the mean of its divisors is an integer number (82728457).

Almost surely, 2^165456913 is an apocalyptic number.

It is an amenable number.

165456913 is a deficient number, since it is larger than the sum of its proper divisors (1).

165456913 is an equidigital number, since it uses as much as digits as its factorization.

165456913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 40.

The square root of 165456913 is about 12863.0055974488. The cubic root of 165456913 is about 548.9864673070.

The spelling of 165456913 in words is "one hundred sixty-five million, four hundred fifty-six thousand, nine hundred thirteen".