86621042887 has 2 divisors, whose sum is σ = 86621042888. Its totient is φ = 86621042886.

The previous prime is 86621042873. The next prime is 86621042951. The reversal of 86621042887 is 78824012668.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86621042887 - 2³⁵ = 52261304519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86621042857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43310521443 + 43310521444.

It is an arithmetic number, because the mean of its divisors is an integer number (43310521444).

Almost surely, 2^86621042887 is an apocalyptic number.

86621042887 is a deficient number, since it is larger than the sum of its proper divisors (1).

86621042887 is an equidigital number, since it uses as much as digits as its factorization.

86621042887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2064384, while the sum is 52.

The spelling of 86621042887 in words is "eighty-six billion, six hundred twenty-one million, forty-two thousand, eight hundred eighty-seven".