313623921 has 16 divisors (see below), whose sum is σ = 450752960. Its totient is φ = 192818880.

The previous prime is 313623901. The next prime is 313623943. The reversal of 313623921 is 129326313.

It is not a de Polignac number, because 313623921 - 2⁵ = 313623889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313623901) 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 15 ways as a sum of consecutive naturals, for example, 47235 + ... + 53463.

It is an arithmetic number, because the mean of its divisors is an integer number (28172060).

Almost surely, 2^313623921 is an apocalyptic number.

It is an amenable number.

313623921 is a deficient number, since it is larger than the sum of its proper divisors (137129039).

313623921 is a wasteful number, since it uses less digits than its factorization.

313623921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7536.

The product of its digits is 5832, while the sum is 30.

The square root of 313623921 is about 17709.4302844558. The cubic root of 313623921 is about 679.4169750326.

It can be divided in two parts, 3136239 and 21, that added together give a triangular number (3136260 = T₂₅₀₄).

The spelling of 313623921 in words is "three hundred thirteen million, six hundred twenty-three thousand, nine hundred twenty-one".