811138173 has 12 divisors (see below), whose sum is σ = 1105027200. Its totient is φ = 529248952.

The previous prime is 811138169. The next prime is 811138183. The reversal of 811138173 is 371831118.

It is not a de Polignac number, because 811138173 - 2² = 811138169 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811138183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54573 + ... + 67826.

It is an arithmetic number, because the mean of its divisors is an integer number (92085600).

Almost surely, 2^811138173 is an apocalyptic number.

It is an amenable number.

811138173 is a deficient number, since it is larger than the sum of its proper divisors (293889027).

811138173 is a wasteful number, since it uses less digits than its factorization.

811138173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122496 (or 122449 counting only the distinct ones).

The product of its digits is 4032, while the sum is 33.

The square root of 811138173 is about 28480.4875836071. The cubic root of 811138173 is about 932.6061607940.

The spelling of 811138173 in words is "eight hundred eleven million, one hundred thirty-eight thousand, one hundred seventy-three".