312399937 has 2 divisors, whose sum is σ = 312399938. Its totient is φ = 312399936.

The previous prime is 312399911. The next prime is 312400001. The reversal of 312399937 is 739993213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310323456 + 2076481 = 17616^2 + 1441^2 .

It is an emirp because it is prime and its reverse (739993213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312399937 is a prime.

It is not a weakly prime, because it can be changed into another prime (312399907) 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, 156199968 + 156199969.

It is an arithmetic number, because the mean of its divisors is an integer number (156199969).

Almost surely, 2^312399937 is an apocalyptic number.

It is an amenable number.

312399937 is a deficient number, since it is larger than the sum of its proper divisors (1).

312399937 is an equidigital number, since it uses as much as digits as its factorization.

312399937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562, while the sum is 46.

The square root of 312399937 is about 17674.8390940342. The cubic root of 312399937 is about 678.5319663446.

The spelling of 312399937 in words is "three hundred twelve million, three hundred ninety-nine thousand, nine hundred thirty-seven".