315499397 has 2 divisors, whose sum is σ = 315499398. Its totient is φ = 315499396.

The previous prime is 315499367. The next prime is 315499411. The reversal of 315499397 is 793994513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202948516 + 112550881 = 14246^2 + 10609^2 .

It is a cyclic number.

It is not a de Polignac number, because 315499397 - 2¹⁴ = 315483013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315499337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157749698 + 157749699.

It is an arithmetic number, because the mean of its divisors is an integer number (157749699).

Almost surely, 2^315499397 is an apocalyptic number.

It is an amenable number.

315499397 is a deficient number, since it is larger than the sum of its proper divisors (1).

315499397 is an equidigital number, since it uses as much as digits as its factorization.

315499397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 50.

The square root of 315499397 is about 17762.3026941892. The cubic root of 315499397 is about 680.7685924509.

The spelling of 315499397 in words is "three hundred fifteen million, four hundred ninety-nine thousand, three hundred ninety-seven".