6831472691 has 4 divisors (see below), whose sum is σ = 6876714384. Its totient is φ = 6786231000.

The previous prime is 6831472663. The next prime is 6831472699. The reversal of 6831472691 is 1962741386.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6831472691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6831472699) 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, 22620620 + ... + 22620921.

It is an arithmetic number, because the mean of its divisors is an integer number (1719178596).

Almost surely, 2^6831472691 is an apocalyptic number.

6831472691 is a deficient number, since it is larger than the sum of its proper divisors (45241693).

6831472691 is a wasteful number, since it uses less digits than its factorization.

6831472691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45241692.

The product of its digits is 435456, while the sum is 47.

The square root of 6831472691 is about 82652.7234336534. The cubic root of 6831472691 is about 1897.4548276495.

The spelling of 6831472691 in words is "six billion, eight hundred thirty-one million, four hundred seventy-two thousand, six hundred ninety-one".