6899860831 has 4 divisors (see below), whose sum is σ = 6920706664. Its totient is φ = 6879015000.

The previous prime is 6899860829. The next prime is 6899860837. The reversal of 6899860831 is 1380689986.

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 6899860831 - 2¹ = 6899860829 is a prime.

It is a super-2 number, since 2×6899860831² = 95216158974336021122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6899860837) 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, 10422420 + ... + 10423081.

It is an arithmetic number, because the mean of its divisors is an integer number (1730176666).

Almost surely, 2^6899860831 is an apocalyptic number.

6899860831 is a deficient number, since it is larger than the sum of its proper divisors (20845833).

6899860831 is a wasteful number, since it uses less digits than its factorization.

6899860831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20845832.

The product of its (nonzero) digits is 4478976, while the sum is 58.

The square root of 6899860831 is about 83065.4009260173. The cubic root of 6899860831 is about 1903.7654625093.

The spelling of 6899860831 in words is "six billion, eight hundred ninety-nine million, eight hundred sixty thousand, eight hundred thirty-one".