313981438 has 4 divisors (see below), whose sum is σ = 470972160. Its totient is φ = 156990718.

The previous prime is 313981391. The next prime is 313981453. The reversal of 313981438 is 834189313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834189313 = 53 ⋅15739421.

It is a self number, because there is not a number n which added to its sum of digits gives 313981438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78495358 + ... + 78495361.

It is an arithmetic number, because the mean of its divisors is an integer number (117743040).

Almost surely, 2^313981438 is an apocalyptic number.

313981438 is a deficient number, since it is larger than the sum of its proper divisors (156990722).

313981438 is a wasteful number, since it uses less digits than its factorization.

313981438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156990721.

The product of its digits is 62208, while the sum is 40.

The square root of 313981438 is about 17719.5213817981. The cubic root of 313981438 is about 679.6750451407.

The spelling of 313981438 in words is "three hundred thirteen million, nine hundred eighty-one thousand, four hundred thirty-eight".