195924921 has 4 divisors (see below), whose sum is σ = 261233232. Its totient is φ = 130616612.

The previous prime is 195924913. The next prime is 195924931. The reversal of 195924921 is 129429591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 195924921 - 2³ = 195924913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195924931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32654151 + ... + 32654156.

It is an arithmetic number, because the mean of its divisors is an integer number (65308308).

Almost surely, 2^195924921 is an apocalyptic number.

It is an amenable number.

195924921 is a deficient number, since it is larger than the sum of its proper divisors (65308311).

195924921 is an equidigital number, since it uses as much as digits as its factorization.

195924921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65308310.

The product of its digits is 58320, while the sum is 42.

The square root of 195924921 is about 13997.3183503127. The cubic root of 195924921 is about 580.8043941860.

The spelling of 195924921 in words is "one hundred ninety-five million, nine hundred twenty-four thousand, nine hundred twenty-one".