315488979 has 32 divisors (see below), whose sum is σ = 515074560. Its totient is φ = 189622944.

The previous prime is 315488923. The next prime is 315488993. The reversal of 315488979 is 979884513.

315488979 is a `hidden beast` number, since 3 + 1 + 548 + 8 + 97 + 9 = 666.

It is not a de Polignac number, because 315488979 - 2⁷ = 315488851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (315488779) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4642 + ... + 25544.

It is an arithmetic number, because the mean of its divisors is an integer number (16096080).

Almost surely, 2^315488979 is an apocalyptic number.

315488979 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

315488979 is a deficient number, since it is larger than the sum of its proper divisors (199585581).

315488979 is a wasteful number, since it uses less digits than its factorization.

315488979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20968 (or 20962 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 315488979 is about 17762.0094302418. The cubic root of 315488979 is about 680.7610992245.

The spelling of 315488979 in words is "three hundred fifteen million, four hundred eighty-eight thousand, nine hundred seventy-nine".