313721947 has 16 divisors (see below), whose sum is σ = 394732800. Its totient is φ = 242209440.

The previous prime is 313721921. The next prime is 313721957. The reversal of 313721947 is 749127313.

It is a happy number.

It is not a de Polignac number, because 313721947 - 2⁷ = 313721819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (313721957) 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, 10297 + ... + 27082.

It is an arithmetic number, because the mean of its divisors is an integer number (24670800).

Almost surely, 2^313721947 is an apocalyptic number.

313721947 is a deficient number, since it is larger than the sum of its proper divisors (81010853).

313721947 is a wasteful number, since it uses less digits than its factorization.

313721947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37506.

The product of its digits is 31752, while the sum is 37.

The square root of 313721947 is about 17712.1976897278. The cubic root of 313721947 is about 679.4877536375.

The spelling of 313721947 in words is "three hundred thirteen million, seven hundred twenty-one thousand, nine hundred forty-seven".