312716977 has 2 divisors, whose sum is σ = 312716978. Its totient is φ = 312716976.

The previous prime is 312716959. The next prime is 312717017. The reversal of 312716977 is 779617213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166693921 + 146023056 = 12911^2 + 12084^2 .

It is an emirp because it is prime and its reverse (779617213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312716977 - 2¹⁵ = 312684209 is a prime.

It is not a weakly prime, because it can be changed into another prime (312716177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156358488 + 156358489.

It is an arithmetic number, because the mean of its divisors is an integer number (156358489).

Almost surely, 2^312716977 is an apocalyptic number.

It is an amenable number.

312716977 is a deficient number, since it is larger than the sum of its proper divisors (1).

312716977 is an equidigital number, since it uses as much as digits as its factorization.

312716977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 43.

The square root of 312716977 is about 17683.8055010792. The cubic root of 312716977 is about 678.7614254640.

The spelling of 312716977 in words is "three hundred twelve million, seven hundred sixteen thousand, nine hundred seventy-seven".