861793231 has 8 divisors (see below), whose sum is σ = 929361440. Its totient is φ = 794407392.

The previous prime is 861793213. The next prime is 861793237. The reversal of 861793231 is 132397168.

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 861793231 - 2⁵ = 861793199 is a prime.

It is a super-2 number, since 2×861793231² = 1485375145994838722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861793237) 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, 35691 + ... + 54748.

It is an arithmetic number, because the mean of its divisors is an integer number (116170180).

Almost surely, 2^861793231 is an apocalyptic number.

861793231 is a deficient number, since it is larger than the sum of its proper divisors (67568209).

861793231 is a wasteful number, since it uses less digits than its factorization.

861793231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91185.

The product of its digits is 54432, while the sum is 40.

The square root of 861793231 is about 29356.3150105731. The cubic root of 861793231 is about 951.6290538504.

The spelling of 861793231 in words is "eight hundred sixty-one million, seven hundred ninety-three thousand, two hundred thirty-one".