315128893 has 2 divisors, whose sum is σ = 315128894. Its totient is φ = 315128892.

The previous prime is 315128887. The next prime is 315128899. The reversal of 315128893 is 398821513.

It is a balanced prime because it is at equal distance from previous prime (315128887) and next prime (315128899).

It can be written as a sum of positive squares in only one way, i.e., 220611609 + 94517284 = 14853^2 + 9722^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315128893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315128899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157564446 + 157564447.

It is an arithmetic number, because the mean of its divisors is an integer number (157564447).

Almost surely, 2^315128893 is an apocalyptic number.

It is an amenable number.

315128893 is a deficient number, since it is larger than the sum of its proper divisors (1).

315128893 is an equidigital number, since it uses as much as digits as its factorization.

315128893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 315128893 is about 17751.8701268345. The cubic root of 315128893 is about 680.5020031566.

The spelling of 315128893 in words is "three hundred fifteen million, one hundred twenty-eight thousand, eight hundred ninety-three".