6813309939 has 8 divisors (see below), whose sum is σ = 9113624832. Its totient is φ = 4527600840.

The previous prime is 6813309917. The next prime is 6813310001. The reversal of 6813309939 is 9399033186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6813309939 - 2⁸ = 6813309683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6813309891 and 6813309900.

It is not an unprimeable number, because it can be changed into a prime (6813308939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3650359 + ... + 3652224.

It is an arithmetic number, because the mean of its divisors is an integer number (1139203104).

Almost surely, 2^6813309939 is an apocalyptic number.

6813309939 is a deficient number, since it is larger than the sum of its proper divisors (2300314893).

6813309939 is a wasteful number, since it uses less digits than its factorization.

6813309939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7302897.

The product of its (nonzero) digits is 944784, while the sum is 51.

The square root of 6813309939 is about 82542.7764192603. The cubic root of 6813309939 is about 1895.7717552806.

The spelling of 6813309939 in words is "six billion, eight hundred thirteen million, three hundred nine thousand, nine hundred thirty-nine".