315318893 has 2 divisors, whose sum is σ = 315318894. Its totient is φ = 315318892.

The previous prime is 315318863. The next prime is 315318919. The reversal of 315318893 is 398813513.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248945284 + 66373609 = 15778^2 + 8147^2 .

It is a cyclic number.

It is not a de Polignac number, because 315318893 - 2²⁶ = 248210029 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315318893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315318803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157659446 + 157659447.

It is an arithmetic number, because the mean of its divisors is an integer number (157659447).

Almost surely, 2^315318893 is an apocalyptic number.

It is an amenable number.

315318893 is a deficient number, since it is larger than the sum of its proper divisors (1).

315318893 is an equidigital number, since it uses as much as digits as its factorization.

315318893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 315318893 is about 17757.2208692689. The cubic root of 315318893 is about 680.6387402261.

The spelling of 315318893 in words is "three hundred fifteen million, three hundred eighteen thousand, eight hundred ninety-three".