811606117 has 4 divisors (see below), whose sum is σ = 927549856. Its totient is φ = 695662380.

The previous prime is 811606097. The next prime is 811606153. The reversal of 811606117 is 711606118.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-811606117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811606217) 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, 57971859 + ... + 57971872.

It is an arithmetic number, because the mean of its divisors is an integer number (231887464).

Almost surely, 2^811606117 is an apocalyptic number.

It is an amenable number.

811606117 is a deficient number, since it is larger than the sum of its proper divisors (115943739).

811606117 is a wasteful number, since it uses less digits than its factorization.

811606117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115943738.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 811606117 is about 28488.7015674635. The cubic root of 811606117 is about 932.7854658650.

Subtracting from 811606117 its reverse (711606118), we obtain a palindrome (99999999).

The spelling of 811606117 in words is "eight hundred eleven million, six hundred six thousand, one hundred seventeen".