86559491 has 2 divisors, whose sum is σ = 86559492. Its totient is φ = 86559490.

The previous prime is 86559467. The next prime is 86559493. The reversal of 86559491 is 19495568.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86559491 - 2¹⁸ = 86297347 is a prime.

It is a Sophie Germain prime.

Together with 86559493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86559493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43279745 + 43279746.

It is an arithmetic number, because the mean of its divisors is an integer number (43279746).

Almost surely, 2^86559491 is an apocalyptic number.

86559491 is a deficient number, since it is larger than the sum of its proper divisors (1).

86559491 is an equidigital number, since it uses as much as digits as its factorization.

86559491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 47.

The square root of 86559491 is about 9303.7353251261. The cubic root of 86559491 is about 442.3556357139.

The spelling of 86559491 in words is "eighty-six million, five hundred fifty-nine thousand, four hundred ninety-one".