86881891 has 2 divisors, whose sum is σ = 86881892. Its totient is φ = 86881890.

The previous prime is 86881877. The next prime is 86881903. The reversal of 86881891 is 19818868.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86881891 - 2⁵ = 86881859 is a prime.

It is not a weakly prime, because it can be changed into another prime (86881831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43440945 + 43440946.

It is an arithmetic number, because the mean of its divisors is an integer number (43440946).

Almost surely, 2^86881891 is an apocalyptic number.

86881891 is a deficient number, since it is larger than the sum of its proper divisors (1).

86881891 is an equidigital number, since it uses as much as digits as its factorization.

86881891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 49.

The square root of 86881891 is about 9321.0455958546. The cubic root of 86881891 is about 442.9041554224.

The spelling of 86881891 in words is "eighty-six million, eight hundred eighty-one thousand, eight hundred ninety-one".