312420949 has 2 divisors, whose sum is σ = 312420950. Its totient is φ = 312420948.

The previous prime is 312420907. The next prime is 312421001. The reversal of 312420949 is 949024213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309126724 + 3294225 = 17582^2 + 1815^2 .

It is a cyclic number.

It is not a de Polignac number, because 312420949 - 2²³ = 304032341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312420149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156210474 + 156210475.

It is an arithmetic number, because the mean of its divisors is an integer number (156210475).

Almost surely, 2^312420949 is an apocalyptic number.

It is an amenable number.

312420949 is a deficient number, since it is larger than the sum of its proper divisors (1).

312420949 is an equidigital number, since it uses as much as digits as its factorization.

312420949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 312420949 is about 17675.4334883193. The cubic root of 312420949 is about 678.5471786759.

The spelling of 312420949 in words is "three hundred twelve million, four hundred twenty thousand, nine hundred forty-nine".