315940847 has 2 divisors, whose sum is σ = 315940848. Its totient is φ = 315940846.

The previous prime is 315940831. The next prime is 315940853. The reversal of 315940847 is 748049513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315940847 - 2⁴ = 315940831 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 (315900847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157970423 + 157970424.

It is an arithmetic number, because the mean of its divisors is an integer number (157970424).

Almost surely, 2^315940847 is an apocalyptic number.

315940847 is a deficient number, since it is larger than the sum of its proper divisors (1).

315940847 is an equidigital number, since it uses as much as digits as its factorization.

315940847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 315940847 is about 17774.7249486455. The cubic root of 315940847 is about 681.0859572814.

The spelling of 315940847 in words is "three hundred fifteen million, nine hundred forty thousand, eight hundred forty-seven".