315879547 has 2 divisors, whose sum is σ = 315879548. Its totient is φ = 315879546.

The previous prime is 315879521. The next prime is 315879559. The reversal of 315879547 is 745978513.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315879547 - 2¹⁹ = 315355259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315879547.

It is not a weakly prime, because it can be changed into another prime (315879517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157939773 + 157939774.

It is an arithmetic number, because the mean of its divisors is an integer number (157939774).

Almost surely, 2^315879547 is an apocalyptic number.

315879547 is a deficient number, since it is larger than the sum of its proper divisors (1).

315879547 is an equidigital number, since it uses as much as digits as its factorization.

315879547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 49.

The square root of 315879547 is about 17773.0005063861. Note that the first 3 decimals coincide. The cubic root of 315879547 is about 681.0419055018.

The spelling of 315879547 in words is "three hundred fifteen million, eight hundred seventy-nine thousand, five hundred forty-seven".