312323309 has 2 divisors, whose sum is σ = 312323310. Its totient is φ = 312323308.

The previous prime is 312323293. The next prime is 312323369. The reversal of 312323309 is 903323213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264062500 + 48260809 = 16250^2 + 6947^2 .

It is a cyclic number.

It is not a de Polignac number, because 312323309 - 2⁴ = 312323293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312323369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156161654 + 156161655.

It is an arithmetic number, because the mean of its divisors is an integer number (156161655).

Almost surely, 2^312323309 is an apocalyptic number.

It is an amenable number.

312323309 is a deficient number, since it is larger than the sum of its proper divisors (1).

312323309 is an equidigital number, since it uses as much as digits as its factorization.

312323309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 26.

The square root of 312323309 is about 17672.6712468715. The cubic root of 312323309 is about 678.4764831929.

The spelling of 312323309 in words is "three hundred twelve million, three hundred twenty-three thousand, three hundred nine".