312711947 has 2 divisors, whose sum is σ = 312711948. Its totient is φ = 312711946.

The previous prime is 312711929. The next prime is 312711989. The reversal of 312711947 is 749117213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312711947 - 2⁸ = 312711691 is a prime.

It is not a weakly prime, because it can be changed into another prime (312711247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156355973 + 156355974.

It is an arithmetic number, because the mean of its divisors is an integer number (156355974).

Almost surely, 2^312711947 is an apocalyptic number.

312711947 is a deficient number, since it is larger than the sum of its proper divisors (1).

312711947 is an equidigital number, since it uses as much as digits as its factorization.

312711947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 35.

The square root of 312711947 is about 17683.6632799881. The cubic root of 312711947 is about 678.7577861900.

The spelling of 312711947 in words is "three hundred twelve million, seven hundred eleven thousand, nine hundred forty-seven".