312858137 has 2 divisors, whose sum is σ = 312858138. Its totient is φ = 312858136.

The previous prime is 312858127. The next prime is 312858149. The reversal of 312858137 is 731858213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274863241 + 37994896 = 16579^2 + 6164^2 .

It is a cyclic number.

It is not a de Polignac number, because 312858137 - 2²⁴ = 296080921 is a prime.

It is a super-2 number, since 2×312858137² = 195760427774221538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312858137.

It is not a weakly prime, because it can be changed into another prime (312858127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156429068 + 156429069.

It is an arithmetic number, because the mean of its divisors is an integer number (156429069).

Almost surely, 2^312858137 is an apocalyptic number.

It is an amenable number.

312858137 is a deficient number, since it is larger than the sum of its proper divisors (1).

312858137 is an equidigital number, since it uses as much as digits as its factorization.

312858137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 312858137 is about 17687.7962731370. The cubic root of 312858137 is about 678.8635407489.

The spelling of 312858137 in words is "three hundred twelve million, eight hundred fifty-eight thousand, one hundred thirty-seven".