195321969 has 16 divisors (see below), whose sum is σ = 291931200. Its totient is φ = 129060288.

The previous prime is 195321967. The next prime is 195321977. The reversal of 195321969 is 969123591.

It is a happy number.

It is not a de Polignac number, because 195321969 - 2¹ = 195321967 is a prime.

It is a super-2 number, since 2×195321969² = 76301343148073922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (195321967) 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, 28959 + ... + 35060.

It is an arithmetic number, because the mean of its divisors is an integer number (18245700).

Almost surely, 2^195321969 is an apocalyptic number.

It is an amenable number.

195321969 is a deficient number, since it is larger than the sum of its proper divisors (96609231).

195321969 is a wasteful number, since it uses less digits than its factorization.

195321969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64141 (or 64135 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 195321969 is about 13975.7636285106. The cubic root of 195321969 is about 580.2079803071.

The spelling of 195321969 in words is "one hundred ninety-five million, three hundred twenty-one thousand, nine hundred sixty-nine".