312912647 has 2 divisors, whose sum is σ = 312912648. Its totient is φ = 312912646.

The previous prime is 312912643. The next prime is 312912671. The reversal of 312912647 is 746219213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312912647 - 2² = 312912643 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312912643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156456323 + 156456324.

It is an arithmetic number, because the mean of its divisors is an integer number (156456324).

Almost surely, 2^312912647 is an apocalyptic number.

312912647 is a deficient number, since it is larger than the sum of its proper divisors (1).

312912647 is an equidigital number, since it uses as much as digits as its factorization.

312912647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 312912647 is about 17689.3370989418. The cubic root of 312912647 is about 678.9029651166.

The spelling of 312912647 in words is "three hundred twelve million, nine hundred twelve thousand, six hundred forty-seven".