315977539 has 2 divisors, whose sum is σ = 315977540. Its totient is φ = 315977538.

The previous prime is 315977531. The next prime is 315977567. The reversal of 315977539 is 935779513.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (935779513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315977539 - 2³ = 315977531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 315977492 and 315977501.

It is not a weakly prime, because it can be changed into another prime (315977531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157988769 + 157988770.

It is an arithmetic number, because the mean of its divisors is an integer number (157988770).

Almost surely, 2^315977539 is an apocalyptic number.

315977539 is a deficient number, since it is larger than the sum of its proper divisors (1).

315977539 is an equidigital number, since it uses as much as digits as its factorization.

315977539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 893025, while the sum is 49.

The square root of 315977539 is about 17775.7570584209. The cubic root of 315977539 is about 681.1123223840.

The spelling of 315977539 in words is "three hundred fifteen million, nine hundred seventy-seven thousand, five hundred thirty-nine".