195640313 has 8 divisors (see below), whose sum is σ = 213651840. Its totient is φ = 177666480.

The previous prime is 195640307. The next prime is 195640339. The reversal of 195640313 is 313046591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195640313 - 2⁴ = 195640297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195640313.

It is not an unprimeable number, because it can be changed into a prime (195640303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2048 + ... + 19886.

It is an arithmetic number, because the mean of its divisors is an integer number (26706480).

Almost surely, 2^195640313 is an apocalyptic number.

It is an amenable number.

195640313 is a deficient number, since it is larger than the sum of its proper divisors (18011527).

195640313 is a wasteful number, since it uses less digits than its factorization.

195640313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18847.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 195640313 is about 13987.1481367718. The cubic root of 195640313 is about 580.5230250405.

The spelling of 195640313 in words is "one hundred ninety-five million, six hundred forty thousand, three hundred thirteen".