86885891 has 2 divisors, whose sum is σ = 86885892. Its totient is φ = 86885890.

The previous prime is 86885857. The next prime is 86885893. The reversal of 86885891 is 19858868.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86885891 - 2¹⁰ = 86884867 is a prime.

It is a Sophie Germain prime.

Together with 86885893, 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 (86885893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43442945 + 43442946.

It is an arithmetic number, because the mean of its divisors is an integer number (43442946).

Almost surely, 2^86885891 is an apocalyptic number.

86885891 is a deficient number, since it is larger than the sum of its proper divisors (1).

86885891 is an equidigital number, since it uses as much as digits as its factorization.

86885891 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 86885891 is about 9321.2601615876. The cubic root of 86885891 is about 442.9109523487.

The spelling of 86885891 in words is "eighty-six million, eight hundred eighty-five thousand, eight hundred ninety-one".