86138791 has 2 divisors, whose sum is σ = 86138792. Its totient is φ = 86138790.

The previous prime is 86138783. The next prime is 86138803. The reversal of 86138791 is 19783168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86138791 - 2³ = 86138783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86138291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43069395 + 43069396.

It is an arithmetic number, because the mean of its divisors is an integer number (43069396).

Almost surely, 2^86138791 is an apocalyptic number.

86138791 is a deficient number, since it is larger than the sum of its proper divisors (1).

86138791 is an equidigital number, since it uses as much as digits as its factorization.

86138791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 86138791 is about 9281.0985879905. The cubic root of 86138791 is about 441.6378198477.

The spelling of 86138791 in words is "eighty-six million, one hundred thirty-eight thousand, seven hundred ninety-one".