313656421 has 16 divisors (see below), whose sum is σ = 341334000. Its totient is φ = 286507008.

The previous prime is 313656401. The next prime is 313656461. The reversal of 313656421 is 124656313.

It can be written as a sum of positive squares in 8 ways, for example, as 12321 + 313644100 = 111^2 + 17710^2 .

It is a cyclic number.

It is not a de Polignac number, because 313656421 - 2¹³ = 313648229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313656401) 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 in 15 ways as a sum of consecutive naturals, for example, 898555 + ... + 898903.

It is an arithmetic number, because the mean of its divisors is an integer number (21333375).

Almost surely, 2^313656421 is an apocalyptic number.

It is an amenable number.

313656421 is a deficient number, since it is larger than the sum of its proper divisors (27677579).

313656421 is a wasteful number, since it uses less digits than its factorization.

313656421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its digits is 12960, while the sum is 31.

The square root of 313656421 is about 17710.3478509034. The cubic root of 313656421 is about 679.4404429374.

The spelling of 313656421 in words is "three hundred thirteen million, six hundred fifty-six thousand, four hundred twenty-one".