3111939989 has 4 divisors (see below), whose sum is σ = 3112166400. Its totient is φ = 3111713580.

The previous prime is 3111939973. The next prime is 3111940021. The reversal of 3111939989 is 9899391113.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9899391113 = 29789 ⋅332317.

It is a cyclic number.

It is not a de Polignac number, because 3111939989 - 2⁴ = 3111939973 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 3111939989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3119939989) 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, 91157 + ... + 120554.

It is an arithmetic number, because the mean of its divisors is an integer number (778041600).

Almost surely, 2^3111939989 is an apocalyptic number.

It is an amenable number.

3111939989 is a deficient number, since it is larger than the sum of its proper divisors (226411).

3111939989 is a wasteful number, since it uses less digits than its factorization.

3111939989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226410.

The product of its digits is 472392, while the sum is 53.

The square root of 3111939989 is about 55784.7648466855. The cubic root of 3111939989 is about 1459.9693477333.

The spelling of 3111939989 in words is "three billion, one hundred eleven million, nine hundred thirty-nine thousand, nine hundred eighty-nine".