86266391 has 2 divisors, whose sum is σ = 86266392. Its totient is φ = 86266390.

The previous prime is 86266379. The next prime is 86266409. The reversal of 86266391 is 19366268.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86266391 - 2²² = 82072087 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86266331) 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, 43133195 + 43133196.

It is an arithmetic number, because the mean of its divisors is an integer number (43133196).

Almost surely, 2^86266391 is an apocalyptic number.

86266391 is a deficient number, since it is larger than the sum of its proper divisors (1).

86266391 is an equidigital number, since it uses as much as digits as its factorization.

86266391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 86266391 is about 9287.9702303571. The cubic root of 86266391 is about 441.8557827509.

The spelling of 86266391 in words is "eighty-six million, two hundred sixty-six thousand, three hundred ninety-one".