811797663 has 8 divisors (see below), whose sum is σ = 1108796976. Its totient is φ = 527998400.

The previous prime is 811797659. The next prime is 811797683. The reversal of 811797663 is 366797118.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 811797663 - 2² = 811797659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811797683) 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, 3299868 + ... + 3300113.

It is an arithmetic number, because the mean of its divisors is an integer number (138599622).

Almost surely, 2^811797663 is an apocalyptic number.

811797663 is a deficient number, since it is larger than the sum of its proper divisors (296999313).

811797663 is a wasteful number, since it uses less digits than its factorization.

811797663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6600025.

The product of its digits is 381024, while the sum is 48.

The square root of 811797663 is about 28492.0631580095. The cubic root of 811797663 is about 932.8588418812.

The spelling of 811797663 in words is "eight hundred eleven million, seven hundred ninety-seven thousand, six hundred sixty-three".