313623857 has 2 divisors, whose sum is σ = 313623858. Its totient is φ = 313623856.

The previous prime is 313623853. The next prime is 313623889. The reversal of 313623857 is 758326313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186295201 + 127328656 = 13649^2 + 11284^2 .

It is an emirp because it is prime and its reverse (758326313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313623857 - 2² = 313623853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 313623857.

It is not a weakly prime, because it can be changed into another prime (313623853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156811928 + 156811929.

It is an arithmetic number, because the mean of its divisors is an integer number (156811929).

Almost surely, 2^313623857 is an apocalyptic number.

It is an amenable number.

313623857 is a deficient number, since it is larger than the sum of its proper divisors (1).

313623857 is an equidigital number, since it uses as much as digits as its factorization.

313623857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 313623857 is about 17709.4284775088. The cubic root of 313623857 is about 679.4169288173.

The spelling of 313623857 in words is "three hundred thirteen million, six hundred twenty-three thousand, eight hundred fifty-seven".