161495023 has 4 divisors (see below), whose sum is σ = 165433968. Its totient is φ = 157556080.

The previous prime is 161494987. The next prime is 161495051. The reversal of 161495023 is 320594161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320594161 = 557 ⋅575573.

It is a cyclic number.

It is not a de Polignac number, because 161495023 - 2²⁵ = 127940591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161495083) 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, 1969411 + ... + 1969492.

It is an arithmetic number, because the mean of its divisors is an integer number (41358492).

Almost surely, 2^161495023 is an apocalyptic number.

161495023 is a deficient number, since it is larger than the sum of its proper divisors (3938945).

161495023 is an equidigital number, since it uses as much as digits as its factorization.

161495023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938944.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 161495023 is about 12708.0692081842. The cubic root of 161495023 is about 544.5691660013.

The spelling of 161495023 in words is "one hundred sixty-one million, four hundred ninety-five thousand, twenty-three".