312800669 has 2 divisors, whose sum is σ = 312800670. Its totient is φ = 312800668.

The previous prime is 312800599. The next prime is 312800671. The reversal of 312800669 is 966008213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219928900 + 92871769 = 14830^2 + 9637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312800669 is a prime.

It is a super-2 number, since 2×312800669² = 195688517053695122, which contains 22 as substring.

Together with 312800671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312800569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156400334 + 156400335.

It is an arithmetic number, because the mean of its divisors is an integer number (156400335).

Almost surely, 2^312800669 is an apocalyptic number.

It is an amenable number.

312800669 is a deficient number, since it is larger than the sum of its proper divisors (1).

312800669 is an equidigital number, since it uses as much as digits as its factorization.

312800669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 312800669 is about 17686.1716886386. The cubic root of 312800669 is about 678.8219720481.

The spelling of 312800669 in words is "three hundred twelve million, eight hundred thousand, six hundred sixty-nine".