312969109 has 2 divisors, whose sum is σ = 312969110. Its totient is φ = 312969108.

The previous prime is 312969077. The next prime is 312969143. The reversal of 312969109 is 901969213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308880625 + 4088484 = 17575^2 + 2022^2 .

It is a cyclic number.

It is not a de Polignac number, because 312969109 - 2⁵ = 312969077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312969169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156484554 + 156484555.

It is an arithmetic number, because the mean of its divisors is an integer number (156484555).

Almost surely, 2^312969109 is an apocalyptic number.

It is an amenable number.

312969109 is a deficient number, since it is larger than the sum of its proper divisors (1).

312969109 is an equidigital number, since it uses as much as digits as its factorization.

312969109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 312969109 is about 17690.9329601353. The cubic root of 312969109 is about 678.9437964415.

The spelling of 312969109 in words is "three hundred twelve million, nine hundred sixty-nine thousand, one hundred nine".