312346687 has 2 divisors, whose sum is σ = 312346688. Its totient is φ = 312346686.

The previous prime is 312346667. The next prime is 312346709. The reversal of 312346687 is 786643213.

It is a weak prime.

It is an emirp because it is prime and its reverse (786643213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312346687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312346667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156173343 + 156173344.

It is an arithmetic number, because the mean of its divisors is an integer number (156173344).

Almost surely, 2^312346687 is an apocalyptic number.

312346687 is a deficient number, since it is larger than the sum of its proper divisors (1).

312346687 is an equidigital number, since it uses as much as digits as its factorization.

312346687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 40.

The square root of 312346687 is about 17673.3326512008. The cubic root of 312346687 is about 678.4934111935.

The spelling of 312346687 in words is "three hundred twelve million, three hundred forty-six thousand, six hundred eighty-seven".