312681013 has 2 divisors, whose sum is σ = 312681014. Its totient is φ = 312681012.

The previous prime is 312681001. The next prime is 312681023. The reversal of 312681013 is 310186213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312653124 + 27889 = 17682^2 + 167^2 .

It is a cyclic number.

It is not a de Polignac number, because 312681013 - 2⁵ = 312680981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312681023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156340506 + 156340507.

It is an arithmetic number, because the mean of its divisors is an integer number (156340507).

Almost surely, 2^312681013 is an apocalyptic number.

It is an amenable number.

312681013 is a deficient number, since it is larger than the sum of its proper divisors (1).

312681013 is an equidigital number, since it uses as much as digits as its factorization.

312681013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 312681013 is about 17682.7886092664. The cubic root of 312681013 is about 678.7354041587.

The spelling of 312681013 in words is "three hundred twelve million, six hundred eighty-one thousand, thirteen".