165957119 has 2 divisors, whose sum is σ = 165957120. Its totient is φ = 165957118.

The previous prime is 165957097. The next prime is 165957131. The reversal of 165957119 is 911759561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165957119 - 2⁸ = 165956863 is a prime.

It is a super-2 number, since 2×165957119² = 55083530693560322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165957119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165957019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82978559 + 82978560.

It is an arithmetic number, because the mean of its divisors is an integer number (82978560).

Almost surely, 2^165957119 is an apocalyptic number.

165957119 is a deficient number, since it is larger than the sum of its proper divisors (1).

165957119 is an equidigital number, since it uses as much as digits as its factorization.

165957119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85050, while the sum is 44.

The square root of 165957119 is about 12882.4345137090. The cubic root of 165957119 is about 549.5391390079.

The spelling of 165957119 in words is "one hundred sixty-five million, nine hundred fifty-seven thousand, one hundred nineteen".