312465409 has 2 divisors, whose sum is σ = 312465410. Its totient is φ = 312465408.

The previous prime is 312465403. The next prime is 312465487. The reversal of 312465409 is 904564213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284934400 + 27531009 = 16880^2 + 5247^2 .

It is a cyclic number.

It is not a de Polignac number, because 312465409 - 2²¹ = 310368257 is a prime.

It is not a weakly prime, because it can be changed into another prime (312465403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156232704 + 156232705.

It is an arithmetic number, because the mean of its divisors is an integer number (156232705).

Almost surely, 2^312465409 is an apocalyptic number.

It is an amenable number.

312465409 is a deficient number, since it is larger than the sum of its proper divisors (1).

312465409 is an equidigital number, since it uses as much as digits as its factorization.

312465409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 312465409 is about 17676.6911213609. The cubic root of 312465409 is about 678.5793647129.

The spelling of 312465409 in words is "three hundred twelve million, four hundred sixty-five thousand, four hundred nine".