315128899 has 2 divisors, whose sum is σ = 315128900. Its totient is φ = 315128898.

The previous prime is 315128893. The next prime is 315128903. The reversal of 315128899 is 998821513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315128899 - 2⁷ = 315128771 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315128893) 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, 157564449 + 157564450.

It is an arithmetic number, because the mean of its divisors is an integer number (157564450).

Almost surely, 2^315128899 is an apocalyptic number.

315128899 is a deficient number, since it is larger than the sum of its proper divisors (1).

315128899 is an equidigital number, since it uses as much as digits as its factorization.

315128899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 46.

The square root of 315128899 is about 17751.8702958308. The cubic root of 315128899 is about 680.5020074755.

The spelling of 315128899 in words is "three hundred fifteen million, one hundred twenty-eight thousand, eight hundred ninety-nine".