3126981913 has 4 divisors (see below), whose sum is σ = 3411253008. Its totient is φ = 2842710820.

The previous prime is 3126981911. The next prime is 3126981931. The reversal of 3126981913 is 3191896213.

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 a cyclic number.

It is not a de Polignac number, because 3126981913 - 2¹ = 3126981911 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 3126981913.

It is not an unprimeable number, because it can be changed into a prime (3126981911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142135531 + ... + 142135552.

It is an arithmetic number, because the mean of its divisors is an integer number (852813252).

Almost surely, 2^3126981913 is an apocalyptic number.

It is an amenable number.

3126981913 is a deficient number, since it is larger than the sum of its proper divisors (284271095).

3126981913 is a wasteful number, since it uses less digits than its factorization.

3126981913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284271094.

The product of its digits is 69984, while the sum is 43.

The square root of 3126981913 is about 55919.4233965265. The cubic root of 3126981913 is about 1462.3178783908.

The spelling of 3126981913 in words is "three billion, one hundred twenty-six million, nine hundred eighty-one thousand, nine hundred thirteen".