866000831 has 2 divisors, whose sum is σ = 866000832. Its totient is φ = 866000830.

The previous prime is 866000809. The next prime is 866000851. The reversal of 866000831 is 138000668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866000831 - 2²⁶ = 798891967 is a prime.

It is a super-2 number, since 2×866000831² = 1499914878585381122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866000851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433000415 + 433000416.

It is an arithmetic number, because the mean of its divisors is an integer number (433000416).

Almost surely, 2^866000831 is an apocalyptic number.

866000831 is a deficient number, since it is larger than the sum of its proper divisors (1).

866000831 is an equidigital number, since it uses as much as digits as its factorization.

866000831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 866000831 is about 29427.8920583857. The cubic root of 866000831 is about 953.1752776287.

The spelling of 866000831 in words is "eight hundred sixty-six million, eight hundred thirty-one", and thus it is an aban number.