165137923 has 2 divisors, whose sum is σ = 165137924. Its totient is φ = 165137922.

The previous prime is 165137897. The next prime is 165137939. The reversal of 165137923 is 329731561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165137923 - 2⁹ = 165137411 is a prime.

It is a super-2 number, since 2×165137923² = 54541067225507858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165137123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82568961 + 82568962.

It is an arithmetic number, because the mean of its divisors is an integer number (82568962).

Almost surely, 2^165137923 is an apocalyptic number.

165137923 is a deficient number, since it is larger than the sum of its proper divisors (1).

165137923 is an equidigital number, since it uses as much as digits as its factorization.

165137923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 37.

The square root of 165137923 is about 12850.6001027189. The cubic root of 165137923 is about 548.6334371204.

The spelling of 165137923 in words is "one hundred sixty-five million, one hundred thirty-seven thousand, nine hundred twenty-three".