312779479 has 2 divisors, whose sum is σ = 312779480. Its totient is φ = 312779478.

The previous prime is 312779417. The next prime is 312779497. The reversal of 312779479 is 974977213.

Together with next prime (312779497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312779479 - 2⁷ = 312779351 is a prime.

It is a super-2 number, since 2×312779479² = 195662004967022882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312774479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156389739 + 156389740.

It is an arithmetic number, because the mean of its divisors is an integer number (156389740).

Almost surely, 2^312779479 is an apocalyptic number.

312779479 is a deficient number, since it is larger than the sum of its proper divisors (1).

312779479 is an equidigital number, since it uses as much as digits as its factorization.

312779479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 666792, while the sum is 49.

The square root of 312779479 is about 17685.5726229037. The cubic root of 312779479 is about 678.8066432633.

The spelling of 312779479 in words is "three hundred twelve million, seven hundred seventy-nine thousand, four hundred seventy-nine".