313478842 has 4 divisors (see below), whose sum is σ = 470218266. Its totient is φ = 156739420.

The previous prime is 313478839. The next prime is 313478857. The reversal of 313478842 is 248874313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 242767561 + 70711281 = 15581^2 + 8409^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 313478795 and 313478804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78369709 + ... + 78369712.

Almost surely, 2^313478842 is an apocalyptic number.

313478842 is a deficient number, since it is larger than the sum of its proper divisors (156739424).

313478842 is a wasteful number, since it uses less digits than its factorization.

313478842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156739423.

The product of its digits is 129024, while the sum is 40.

The square root of 313478842 is about 17705.3337161433. Note that the first 3 decimals coincide. The cubic root of 313478842 is about 679.3121952506.

The spelling of 313478842 in words is "three hundred thirteen million, four hundred seventy-eight thousand, eight hundred forty-two".