312660613 has 2 divisors, whose sum is σ = 312660614. Its totient is φ = 312660612.

The previous prime is 312660589. The next prime is 312660631. The reversal of 312660613 is 316066213.

Together with next prime (312660631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200448964 + 112211649 = 14158^2 + 10593^2 .

It is a cyclic number.

It is not a de Polignac number, because 312660613 - 2⁵ = 312660581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312660683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156330306 + 156330307.

It is an arithmetic number, because the mean of its divisors is an integer number (156330307).

Almost surely, 2^312660613 is an apocalyptic number.

It is an amenable number.

312660613 is a deficient number, since it is larger than the sum of its proper divisors (1).

312660613 is an equidigital number, since it uses as much as digits as its factorization.

312660613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 312660613 is about 17682.2117677625. The cubic root of 312660613 is about 678.7206431053.

The spelling of 312660613 in words is "three hundred twelve million, six hundred sixty thousand, six hundred thirteen".