86231869 has 2 divisors, whose sum is σ = 86231870. Its totient is φ = 86231868.

The previous prime is 86231851. The next prime is 86231911. The reversal of 86231869 is 96813268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73307844 + 12924025 = 8562^2 + 3595^2 .

It is a cyclic number.

It is not a de Polignac number, because 86231869 - 2⁹ = 86231357 is a prime.

It is a super-2 number, since 2×86231869² = 14871870462466322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86211869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43115934 + 43115935.

It is an arithmetic number, because the mean of its divisors is an integer number (43115935).

Almost surely, 2^86231869 is an apocalyptic number.

It is an amenable number.

86231869 is a deficient number, since it is larger than the sum of its proper divisors (1).

86231869 is an equidigital number, since it uses as much as digits as its factorization.

86231869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 43.

The square root of 86231869 is about 9286.1116189716. Note that the first 3 decimals coincide. The cubic root of 86231869 is about 441.7968344152.

The spelling of 86231869 in words is "eighty-six million, two hundred thirty-one thousand, eight hundred sixty-nine".