165593023 has 4 divisors (see below), whose sum is σ = 165861160. Its totient is φ = 165324888.

The previous prime is 165593017. The next prime is 165593033. The reversal of 165593023 is 320395561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165593023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165593023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165593003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133140 + ... + 134377.

It is an arithmetic number, because the mean of its divisors is an integer number (41465290).

Almost surely, 2^165593023 is an apocalyptic number.

165593023 is a deficient number, since it is larger than the sum of its proper divisors (268137).

165593023 is an equidigital number, since it uses as much as digits as its factorization.

165593023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268136.

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 165593023 is about 12868.2952639423. The cubic root of 165593023 is about 549.1369638247.

The spelling of 165593023 in words is "one hundred sixty-five million, five hundred ninety-three thousand, twenty-three".