315476989 has 2 divisors, whose sum is σ = 315476990. Its totient is φ = 315476988.

The previous prime is 315476983. The next prime is 315477011. The reversal of 315476989 is 989674513.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186540964 + 128936025 = 13658^2 + 11355^2 .

It is a cyclic number.

It is not a de Polignac number, because 315476989 - 2⁹ = 315476477 is a prime.

It is a super-2 number, since 2×315476989² = 199051461177012242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315476983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157738494 + 157738495.

It is an arithmetic number, because the mean of its divisors is an integer number (157738495).

Almost surely, 2^315476989 is an apocalyptic number.

It is an amenable number.

315476989 is a deficient number, since it is larger than the sum of its proper divisors (1).

315476989 is an equidigital number, since it uses as much as digits as its factorization.

315476989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 52.

The square root of 315476989 is about 17761.6719089167. The cubic root of 315476989 is about 680.7524751208.

The spelling of 315476989 in words is "three hundred fifteen million, four hundred seventy-six thousand, nine hundred eighty-nine".