161695023 has 16 divisors (see below), whose sum is σ = 248935680. Its totient is φ = 91443456.

The previous prime is 161695019. The next prime is 161695057. The reversal of 161695023 is 320596161.

It is a happy number.

161695023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161695023 - 2² = 161695019 is a prime.

It is a super-2 number, since 2×161695023² = 52290560925941058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161695013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37653 + ... + 41726.

It is an arithmetic number, because the mean of its divisors is an integer number (15558480).

Almost surely, 2^161695023 is an apocalyptic number.

161695023 is a deficient number, since it is larger than the sum of its proper divisors (87240657).

161695023 is an equidigital number, since it uses as much as digits as its factorization.

161695023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79486.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 161695023 is about 12715.9357893943. The cubic root of 161695023 is about 544.7938765454.

The spelling of 161695023 in words is "one hundred sixty-one million, six hundred ninety-five thousand, twenty-three".