165570023 has 2 divisors, whose sum is σ = 165570024. Its totient is φ = 165570022.

The previous prime is 165569959. The next prime is 165570071. The reversal of 165570023 is 320075561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165570023 - 2⁶ = 165569959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165570073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82785011 + 82785012.

It is an arithmetic number, because the mean of its divisors is an integer number (82785012).

Almost surely, 2^165570023 is an apocalyptic number.

165570023 is a deficient number, since it is larger than the sum of its proper divisors (1).

165570023 is an equidigital number, since it uses as much as digits as its factorization.

165570023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 165570023 is about 12867.4015636414. The cubic root of 165570023 is about 549.1115385688. Note that the first 3 decimals are identical.

The spelling of 165570023 in words is "one hundred sixty-five million, five hundred seventy thousand, twenty-three".