312494137913 has 2 divisors, whose sum is σ = 312494137914. Its totient is φ = 312494137912.

The previous prime is 312494137903. The next prime is 312494137931. The reversal of 312494137913 is 319731494213.

Together with next prime (312494137931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308366974864 + 4127163049 = 555308^2 + 64243^2 .

It is a cyclic number.

It is not a de Polignac number, because 312494137913 - 2⁴ = 312494137897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (312494137903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156247068956 + 156247068957.

It is an arithmetic number, because the mean of its divisors is an integer number (156247068957).

Almost surely, 2^312494137913 is an apocalyptic number.

It is an amenable number.

312494137913 is a deficient number, since it is larger than the sum of its proper divisors (1).

312494137913 is an equidigital number, since it uses as much as digits as its factorization.

312494137913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 47.

The spelling of 312494137913 in words is "three hundred twelve billion, four hundred ninety-four million, one hundred thirty-seven thousand, nine hundred thirteen".