312423257 has 2 divisors, whose sum is σ = 312423258. Its totient is φ = 312423256.

The previous prime is 312423193. The next prime is 312423259. The reversal of 312423257 is 752324213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311028496 + 1394761 = 17636^2 + 1181^2 .

It is a cyclic number.

It is not a de Polignac number, because 312423257 - 2⁶ = 312423193 is a prime.

Together with 312423259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (312423259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156211628 + 156211629.

It is an arithmetic number, because the mean of its divisors is an integer number (156211629).

Almost surely, 2^312423257 is an apocalyptic number.

It is an amenable number.

312423257 is a deficient number, since it is larger than the sum of its proper divisors (1).

312423257 is an equidigital number, since it uses as much as digits as its factorization.

312423257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 29.

The square root of 312423257 is about 17675.4987765551. The cubic root of 312423257 is about 678.5488495872.

The spelling of 312423257 in words is "three hundred twelve million, four hundred twenty-three thousand, two hundred fifty-seven".