312406621 has 2 divisors, whose sum is σ = 312406622. Its totient is φ = 312406620.

The previous prime is 312406579. The next prime is 312406649. The reversal of 312406621 is 126604213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292923225 + 19483396 = 17115^2 + 4414^2 .

It is a cyclic number.

It is not a de Polignac number, because 312406621 - 2¹⁷ = 312275549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312406691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156203310 + 156203311.

It is an arithmetic number, because the mean of its divisors is an integer number (156203311).

Almost surely, 2^312406621 is an apocalyptic number.

It is an amenable number.

312406621 is a deficient number, since it is larger than the sum of its proper divisors (1).

312406621 is an equidigital number, since it uses as much as digits as its factorization.

312406621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 312406621 is about 17675.0281753665. The cubic root of 312406621 is about 678.5368055211.

The spelling of 312406621 in words is "three hundred twelve million, four hundred six thousand, six hundred twenty-one".