86311391 has 2 divisors, whose sum is σ = 86311392. Its totient is φ = 86311390.

The previous prime is 86311369. The next prime is 86311447. The reversal of 86311391 is 19311368.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86311391 - 2⁶ = 86311327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86311301) 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, 43155695 + 43155696.

It is an arithmetic number, because the mean of its divisors is an integer number (43155696).

Almost surely, 2^86311391 is an apocalyptic number.

86311391 is a deficient number, since it is larger than the sum of its proper divisors (1).

86311391 is an equidigital number, since it uses as much as digits as its factorization.

86311391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 86311391 is about 9290.3924029074. The cubic root of 86311391 is about 441.9325992787.

The spelling of 86311391 in words is "eighty-six million, three hundred eleven thousand, three hundred ninety-one".