161395423 has 4 divisors (see below), whose sum is σ = 184451920. Its totient is φ = 138338928.

The previous prime is 161395391. The next prime is 161395463. The reversal of 161395423 is 324593161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324593161 = 59 ⋅5501579.

It is not a de Polignac number, because 161395423 - 2⁵ = 161395391 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 (161395463) 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, 11528238 + ... + 11528251.

It is an arithmetic number, because the mean of its divisors is an integer number (46112980).

Almost surely, 2^161395423 is an apocalyptic number.

161395423 is a deficient number, since it is larger than the sum of its proper divisors (23056497).

161395423 is an equidigital number, since it uses as much as digits as its factorization.

161395423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23056496.

The product of its digits is 19440, while the sum is 34.

The square root of 161395423 is about 12704.1498338141. The cubic root of 161395423 is about 544.4571909444.

The spelling of 161395423 in words is "one hundred sixty-one million, three hundred ninety-five thousand, four hundred twenty-three".