195634621 has 16 divisors (see below), whose sum is σ = 253456000. Its totient is φ = 146639808.

The previous prime is 195634613. The next prime is 195634639. The reversal of 195634621 is 126436591.

It is not a de Polignac number, because 195634621 - 2³ = 195634613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195634601) 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, 54846 + ... + 58303.

It is an arithmetic number, because the mean of its divisors is an integer number (15841000).

Almost surely, 2^195634621 is an apocalyptic number.

It is an amenable number.

195634621 is a deficient number, since it is larger than the sum of its proper divisors (57821379).

195634621 is a wasteful number, since it uses less digits than its factorization.

195634621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113188.

The product of its digits is 38880, while the sum is 37.

The square root of 195634621 is about 13986.9446627918. The cubic root of 195634621 is about 580.5173950333.

The spelling of 195634621 in words is "one hundred ninety-five million, six hundred thirty-four thousand, six hundred twenty-one".