312009977 has 2 divisors, whose sum is σ = 312009978. Its totient is φ = 312009976.

The previous prime is 312009949. The next prime is 312010037. The reversal of 312009977 is 779900213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 253319056 + 58690921 = 15916^2 + 7661^2 .

It is a cyclic number.

It is not a de Polignac number, because 312009977 - 2¹⁸ = 311747833 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312009977.

It is not a weakly prime, because it can be changed into another prime (312009377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156004988 + 156004989.

It is an arithmetic number, because the mean of its divisors is an integer number (156004989).

Almost surely, 2^312009977 is an apocalyptic number.

It is an amenable number.

312009977 is a deficient number, since it is larger than the sum of its proper divisors (1).

312009977 is an equidigital number, since it uses as much as digits as its factorization.

312009977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 312009977 is about 17663.8041485972. The cubic root of 312009977 is about 678.2495180379.

The spelling of 312009977 in words is "three hundred twelve million, nine thousand, nine hundred seventy-seven".