165534623 has 2 divisors, whose sum is σ = 165534624. Its totient is φ = 165534622.

The previous prime is 165534521. The next prime is 165534643. The reversal of 165534623 is 326435561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165534623 - 2²⁶ = 98425759 is a prime.

It is a super-2 number, since 2×165534623² = 54803422823504258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165534643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82767311 + 82767312.

It is an arithmetic number, because the mean of its divisors is an integer number (82767312).

Almost surely, 2^165534623 is an apocalyptic number.

165534623 is a deficient number, since it is larger than the sum of its proper divisors (1).

165534623 is an equidigital number, since it uses as much as digits as its factorization.

165534623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 35.

The square root of 165534623 is about 12866.0259210061. The cubic root of 165534623 is about 549.0724011822.

The spelling of 165534623 in words is "one hundred sixty-five million, five hundred thirty-four thousand, six hundred twenty-three".