315646979 has 4 divisors (see below), whose sum is σ = 316812000. Its totient is φ = 314481960.

The previous prime is 315646967. The next prime is 315646997. The reversal of 315646979 is 979646513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 315646979 - 2¹⁶ = 315581443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315646909) 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, 582104 + ... + 582645.

It is an arithmetic number, because the mean of its divisors is an integer number (79203000).

Almost surely, 2^315646979 is an apocalyptic number.

315646979 is a deficient number, since it is larger than the sum of its proper divisors (1165021).

315646979 is a wasteful number, since it uses less digits than its factorization.

315646979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165020.

The product of its digits is 1224720, while the sum is 50.

The square root of 315646979 is about 17766.4565684888. The cubic root of 315646979 is about 680.8747242215.

The spelling of 315646979 in words is "three hundred fifteen million, six hundred forty-six thousand, nine hundred seventy-nine".