312639953 has 2 divisors, whose sum is σ = 312639954. Its totient is φ = 312639952.

The previous prime is 312639881. The next prime is 312639959. The reversal of 312639953 is 359936213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301960129 + 10679824 = 17377^2 + 3268^2 .

It is a cyclic number.

It is not a de Polignac number, because 312639953 - 2¹⁰ = 312638929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312639953.

It is not a weakly prime, because it can be changed into another prime (312639959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156319976 + 156319977.

It is an arithmetic number, because the mean of its divisors is an integer number (156319977).

Almost surely, 2^312639953 is an apocalyptic number.

It is an amenable number.

312639953 is a deficient number, since it is larger than the sum of its proper divisors (1).

312639953 is an equidigital number, since it uses as much as digits as its factorization.

312639953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131220, while the sum is 41.

The square root of 312639953 is about 17681.6275551772. The cubic root of 312639953 is about 678.7056932665.

The spelling of 312639953 in words is "three hundred twelve million, six hundred thirty-nine thousand, nine hundred fifty-three".