313808421 has 8 divisors (see below), whose sum is σ = 418559040. Its totient is φ = 209131712.

The previous prime is 313808413. The next prime is 313808431. The reversal of 313808421 is 124808313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 313808421 - 2³ = 313808413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313808431) 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 7 ways as a sum of consecutive naturals, for example, 7665 + ... + 26198.

It is an arithmetic number, because the mean of its divisors is an integer number (52319880).

Almost surely, 2^313808421 is an apocalyptic number.

It is an amenable number.

313808421 is a deficient number, since it is larger than the sum of its proper divisors (104750619).

313808421 is a wasteful number, since it uses less digits than its factorization.

313808421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36955.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 313808421 is about 17714.6386076601. The cubic root of 313808421 is about 679.5501790078.

The spelling of 313808421 in words is "three hundred thirteen million, eight hundred eight thousand, four hundred twenty-one".