161885023 has 2 divisors, whose sum is σ = 161885024. Its totient is φ = 161885022.

The previous prime is 161884993. The next prime is 161885029. The reversal of 161885023 is 320588161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161885023 - 2⁵ = 161884991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161885023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161885029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80942511 + 80942512.

It is an arithmetic number, because the mean of its divisors is an integer number (80942512).

Almost surely, 2^161885023 is an apocalyptic number.

161885023 is a deficient number, since it is larger than the sum of its proper divisors (1).

161885023 is an equidigital number, since it uses as much as digits as its factorization.

161885023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 161885023 is about 12723.4045365224. The cubic root of 161885023 is about 545.0071799969.

The spelling of 161885023 in words is "one hundred sixty-one million, eight hundred eighty-five thousand, twenty-three".