6838721331 has 8 divisors (see below), whose sum is σ = 9819702480. Its totient is φ = 4208443872.

The previous prime is 6838721299. The next prime is 6838721341. The reversal of 6838721331 is 1331278386.

6838721331 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6838721331 - 2⁵ = 6838721299 is a prime.

It is a super-2 number, since 2×6838721331² = 93536218886148823122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6838721341) 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, 87675876 + ... + 87675953.

It is an arithmetic number, because the mean of its divisors is an integer number (1227462810).

Almost surely, 2^6838721331 is an apocalyptic number.

6838721331 is a deficient number, since it is larger than the sum of its proper divisors (2980981149).

6838721331 is a wasteful number, since it uses less digits than its factorization.

6838721331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175351845.

The product of its digits is 145152, while the sum is 42.

The square root of 6838721331 is about 82696.5617846353. The cubic root of 6838721331 is about 1898.1256983792.

The spelling of 6838721331 in words is "six billion, eight hundred thirty-eight million, seven hundred twenty-one thousand, three hundred thirty-one".