312630449 has 2 divisors, whose sum is σ = 312630450. Its totient is φ = 312630448.

The previous prime is 312630431. The next prime is 312630463. The reversal of 312630449 is 944036213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160478224 + 152152225 = 12668^2 + 12335^2 .

It is a cyclic number.

It is not a de Polignac number, because 312630449 - 2²⁰ = 311581873 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (312630419) 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, 156315224 + 156315225.

It is an arithmetic number, because the mean of its divisors is an integer number (156315225).

Almost surely, 2^312630449 is an apocalyptic number.

It is an amenable number.

312630449 is a deficient number, since it is larger than the sum of its proper divisors (1).

312630449 is an equidigital number, since it uses as much as digits as its factorization.

312630449 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 32.

The square root of 312630449 is about 17681.3587995946. The cubic root of 312630449 is about 678.6988158300.

The spelling of 312630449 in words is "three hundred twelve million, six hundred thirty thousand, four hundred forty-nine".