312672709 has 2 divisors, whose sum is σ = 312672710. Its totient is φ = 312672708.

The previous prime is 312672673. The next prime is 312672743. The reversal of 312672709 is 907276213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292512609 + 20160100 = 17103^2 + 4490^2 .

It is a cyclic number.

It is not a de Polignac number, because 312672709 - 2⁹ = 312672197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312672209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156336354 + 156336355.

It is an arithmetic number, because the mean of its divisors is an integer number (156336355).

Almost surely, 2^312672709 is an apocalyptic number.

It is an amenable number.

312672709 is a deficient number, since it is larger than the sum of its proper divisors (1).

312672709 is an equidigital number, since it uses as much as digits as its factorization.

312672709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 312672709 is about 17682.5538031134. The cubic root of 312672709 is about 678.7293956192.

The spelling of 312672709 in words is "three hundred twelve million, six hundred seventy-two thousand, seven hundred nine".