85188659 has 2 divisors, whose sum is σ = 85188660. Its totient is φ = 85188658.

The previous prime is 85188643. The next prime is 85188661. The reversal of 85188659 is 95688158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85188659 - 2⁴ = 85188643 is a prime.

Together with 85188661, 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 (85188359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42594329 + 42594330.

It is an arithmetic number, because the mean of its divisors is an integer number (42594330).

Almost surely, 2^85188659 is an apocalyptic number.

85188659 is a deficient number, since it is larger than the sum of its proper divisors (1).

85188659 is an equidigital number, since it uses as much as digits as its factorization.

85188659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691200, while the sum is 50.

The square root of 85188659 is about 9229.7702571624. The cubic root of 85188659 is about 440.0080215480.

The spelling of 85188659 in words is "eighty-five million, one hundred eighty-eight thousand, six hundred fifty-nine".