165013791 has 16 divisors (see below), whose sum is σ = 222009984. Its totient is φ = 109018784.

The previous prime is 165013769. The next prime is 165013813. The reversal of 165013791 is 197310561.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (165013769) and next prime (165013813).

It is a cyclic number.

It is not a de Polignac number, because 165013791 - 2⁵ = 165013759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165013691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199120 + ... + 199946.

It is an arithmetic number, because the mean of its divisors is an integer number (13875624).

Almost surely, 2^165013791 is an apocalyptic number.

165013791 is a deficient number, since it is larger than the sum of its proper divisors (56996193).

165013791 is a wasteful number, since it uses less digits than its factorization.

165013791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 165013791 is about 12845.7693813956. The cubic root of 165013791 is about 548.4959358210.

The spelling of 165013791 in words is "one hundred sixty-five million, thirteen thousand, seven hundred ninety-one".