86195731 has 2 divisors, whose sum is σ = 86195732. Its totient is φ = 86195730.

The previous prime is 86195719. The next prime is 86195741. The reversal of 86195731 is 13759168.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86195731 is a prime.

It is a super-2 number, since 2×86195731² = 14859408085248722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86195741) 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, 43097865 + 43097866.

It is an arithmetic number, because the mean of its divisors is an integer number (43097866).

Almost surely, 2^86195731 is an apocalyptic number.

86195731 is a deficient number, since it is larger than the sum of its proper divisors (1).

86195731 is an equidigital number, since it uses as much as digits as its factorization.

86195731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 40.

The square root of 86195731 is about 9284.1656060197. The cubic root of 86195731 is about 441.7351098077.

The spelling of 86195731 in words is "eighty-six million, one hundred ninety-five thousand, seven hundred thirty-one".