86129231 has 2 divisors, whose sum is σ = 86129232. Its totient is φ = 86129230.

The previous prime is 86129213. The next prime is 86129243. The reversal of 86129231 is 13292168.

Together with previous prime (86129213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86129231 - 2⁶ = 86129167 is a prime.

It is a super-2 number, since 2×86129231² = 14836488865302722, 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 (86129291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43064615 + 43064616.

It is an arithmetic number, because the mean of its divisors is an integer number (43064616).

Almost surely, 2^86129231 is an apocalyptic number.

86129231 is a deficient number, since it is larger than the sum of its proper divisors (1).

86129231 is an equidigital number, since it uses as much as digits as its factorization.

86129231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 86129231 is about 9280.5835484629. The cubic root of 86129231 is about 441.6214810464.

The spelling of 86129231 in words is "eighty-six million, one hundred twenty-nine thousand, two hundred thirty-one".