3129913993 has 4 divisors (see below), whose sum is σ = 3188969028. Its totient is φ = 3070858960.

The previous prime is 3129913933. The next prime is 3129913999. The reversal of 3129913993 is 3993199213.

3129913993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2563093129 + 566820864 = 50627^2 + 23808^2 .

It is a cyclic number.

It is not a de Polignac number, because 3129913993 - 2²⁵ = 3096359561 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3129913999) 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, 29527438 + ... + 29527543.

It is an arithmetic number, because the mean of its divisors is an integer number (797242257).

Almost surely, 2^3129913993 is an apocalyptic number.

It is an amenable number.

3129913993 is a deficient number, since it is larger than the sum of its proper divisors (59055035).

3129913993 is an equidigital number, since it uses as much as digits as its factorization.

3129913993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59055034.

The product of its digits is 354294, while the sum is 49.

The square root of 3129913993 is about 55945.6342622014. The cubic root of 3129913993 is about 1462.7747932576.

The spelling of 3129913993 in words is "three billion, one hundred twenty-nine million, nine hundred thirteen thousand, nine hundred ninety-three".