86888591 has 2 divisors, whose sum is σ = 86888592. Its totient is φ = 86888590.

The previous prime is 86888579. The next prime is 86888639. The reversal of 86888591 is 19588868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86888591 - 2¹⁴ = 86872207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86888521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43444295 + 43444296.

It is an arithmetic number, because the mean of its divisors is an integer number (43444296).

Almost surely, 2^86888591 is an apocalyptic number.

86888591 is a deficient number, since it is larger than the sum of its proper divisors (1).

86888591 is an equidigital number, since it uses as much as digits as its factorization.

86888591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1105920, while the sum is 53.

The square root of 86888591 is about 9321.4049906653. The cubic root of 86888591 is about 442.9155401560.

The spelling of 86888591 in words is "eighty-six million, eight hundred eighty-eight thousand, five hundred ninety-one".