312612493 has 2 divisors, whose sum is σ = 312612494. Its totient is φ = 312612492.

The previous prime is 312612467. The next prime is 312612511. The reversal of 312612493 is 394216213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307581444 + 5031049 = 17538^2 + 2243^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312612493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312622493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156306246 + 156306247.

It is an arithmetic number, because the mean of its divisors is an integer number (156306247).

Almost surely, 2^312612493 is an apocalyptic number.

It is an amenable number.

312612493 is a deficient number, since it is larger than the sum of its proper divisors (1).

312612493 is an equidigital number, since it uses as much as digits as its factorization.

312612493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 312612493 is about 17680.8510258980. The cubic root of 312612493 is about 678.6858218416.

The spelling of 312612493 in words is "three hundred twelve million, six hundred twelve thousand, four hundred ninety-three".