165159793 has 2 divisors, whose sum is σ = 165159794. Its totient is φ = 165159792.

The previous prime is 165159781. The next prime is 165159829. The reversal of 165159793 is 397951561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86713344 + 78446449 = 9312^2 + 8857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165159793 is a prime.

It is not a weakly prime, because it can be changed into another prime (165159733) 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, 82579896 + 82579897.

It is an arithmetic number, because the mean of its divisors is an integer number (82579897).

Almost surely, 2^165159793 is an apocalyptic number.

It is an amenable number.

165159793 is a deficient number, since it is larger than the sum of its proper divisors (1).

165159793 is an equidigital number, since it uses as much as digits as its factorization.

165159793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 255150, while the sum is 46.

The square root of 165159793 is about 12851.4510075711. The cubic root of 165159793 is about 548.6576554292.

The spelling of 165159793 in words is "one hundred sixty-five million, one hundred fifty-nine thousand, seven hundred ninety-three".