312660621 has 96 divisors (see below), whose sum is σ = 592945920. Its totient is φ = 161808192.

The previous prime is 312660613. The next prime is 312660631. The reversal of 312660621 is 126066213.

312660621 is a `hidden beast` number, since 31 + 2 + 6 + 6 + 0 + 621 = 666.

It is not a de Polignac number, because 312660621 - 2³ = 312660613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312660631) 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 in 95 ways as a sum of consecutive naturals, for example, 5899231 + ... + 5899283.

It is an arithmetic number, because the mean of its divisors is an integer number (6176520).

Almost surely, 2^312660621 is an apocalyptic number.

It is an amenable number.

312660621 is a deficient number, since it is larger than the sum of its proper divisors (280285299).

312660621 is an frugal number, since it uses more digits than its factorization.

312660621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 312660621 is about 17682.2119939786. The cubic root of 312660621 is about 678.7206488941.

The spelling of 312660621 in words is "three hundred twelve million, six hundred sixty thousand, six hundred twenty-one".