6797815139 has 4 divisors (see below), whose sum is σ = 6926075856. Its totient is φ = 6669554424.

The previous prime is 6797815127. The next prime is 6797815187. The reversal of 6797815139 is 9315187976.

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

It is a cyclic number.

It is not a de Polignac number, because 6797815139 - 2³² = 2502847843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6797815039) 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, 64130279 + ... + 64130384.

It is an arithmetic number, because the mean of its divisors is an integer number (1731518964).

Almost surely, 2^6797815139 is an apocalyptic number.

6797815139 is a deficient number, since it is larger than the sum of its proper divisors (128260717).

6797815139 is a wasteful number, since it uses less digits than its factorization.

6797815139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128260716.

The product of its digits is 2857680, while the sum is 56.

The square root of 6797815139 is about 82448.8637823469. The cubic root of 6797815139 is about 1894.3335458297. Note that the first 3 decimals are identical.

The spelling of 6797815139 in words is "six billion, seven hundred ninety-seven million, eight hundred fifteen thousand, one hundred thirty-nine".