6857992969 has 3 divisors (see below), whose sum is σ = 6858075783. Its totient is φ = 6857910156.

The previous prime is 6857992913. The next prime is 6857993033. The reversal of 6857992969 is 9692997586.

The square root of 6857992969 is 82813.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4990716025 + 1867276944 = 70645^2 + 43212^2 .

It is not a de Polignac number, because 6857992969 - 2¹¹ = 6857990921 is a prime.

It is a super-2 number, since 2×6857992969² = 94064135125706869922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6857992898 and 6857992907.

It is not an unprimeable number, because it can be changed into a prime (6857992769) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 41407 + ... + 124219.

It is an arithmetic number, because the mean of its divisors is an integer number (2286025261).

Almost surely, 2^6857992969 is an apocalyptic number.

6857992969 is the 82813-rd square number.

6857992969 is the 41407-th centered octagonal number.

It is an amenable number.

6857992969 is a deficient number, since it is larger than the sum of its proper divisors (82814).

6857992969 is an frugal number, since it uses more digits than its factorization.

6857992969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165626 (or 82813 counting only the distinct ones).

The product of its digits is 132269760, while the sum is 70.

The cubic root of 6857992969 is about 1899.9070101304.

The spelling of 6857992969 in words is "six billion, eight hundred fifty-seven million, nine hundred ninety-two thousand, nine hundred sixty-nine".