3120111993 has 4 divisors (see below), whose sum is σ = 4160149328. Its totient is φ = 2080074660.

The previous prime is 3120111979. The next prime is 3120112003. The reversal of 3120111993 is 3991110213.

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.

It is not a de Polignac number, because 3120111993 - 2⁹ = 3120111481 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 3120111993.

It is not an unprimeable number, because it can be changed into a prime (3120112993) 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, 520018663 + ... + 520018668.

It is an arithmetic number, because the mean of its divisors is an integer number (1040037332).

Almost surely, 2^3120111993 is an apocalyptic number.

It is an amenable number.

3120111993 is a deficient number, since it is larger than the sum of its proper divisors (1040037335).

3120111993 is a wasteful number, since it uses less digits than its factorization.

3120111993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040037334.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 3120111993 is about 55857.9626642433. The cubic root of 3120111993 is about 1461.2461982986.

The spelling of 3120111993 in words is "three billion, one hundred twenty million, one hundred eleven thousand, nine hundred ninety-three".