3113678721 has 4 divisors (see below), whose sum is σ = 4151571632. Its totient is φ = 2075785812.

The previous prime is 3113678651. The next prime is 3113678731. The reversal of 3113678721 is 1278763113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3113678721 - 2⁷ = 3113678593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3113678721.

It is not an unprimeable number, because it can be changed into a prime (3113678731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518946451 + ... + 518946456.

It is an arithmetic number, because the mean of its divisors is an integer number (1037892908).

Almost surely, 2^3113678721 is an apocalyptic number.

It is an amenable number.

3113678721 is a deficient number, since it is larger than the sum of its proper divisors (1037892911).

3113678721 is a wasteful number, since it uses less digits than its factorization.

3113678721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037892910.

The product of its digits is 42336, while the sum is 39.

The square root of 3113678721 is about 55800.3469612869. The cubic root of 3113678721 is about 1460.2412063169.

The spelling of 3113678721 in words is "three billion, one hundred thirteen million, six hundred seventy-eight thousand, seven hundred twenty-one".