3181378874 has 4 divisors (see below), whose sum is σ = 4772068314. Its totient is φ = 1590689436.

The previous prime is 3181378859. The next prime is 3181378897. The reversal of 3181378874 is 4788731813.

It is a happy number.

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., 2513518225 + 667860649 = 50135^2 + 25843^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 795344717 + ... + 795344720.

Almost surely, 2^3181378874 is an apocalyptic number.

3181378874 is a deficient number, since it is larger than the sum of its proper divisors (1590689440).

3181378874 is a wasteful number, since it uses less digits than its factorization.

3181378874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590689439.

The product of its digits is 903168, while the sum is 50.

The square root of 3181378874 is about 56403.7132997465. The cubic root of 3181378874 is about 1470.7486698053.

The spelling of 3181378874 in words is "three billion, one hundred eighty-one million, three hundred seventy-eight thousand, eight hundred seventy-four".