86868289 has 2 divisors, whose sum is σ = 86868290. Its totient is φ = 86868288.

The previous prime is 86868281. The next prime is 86868349. The reversal of 86868289 is 98286868.

86868289 is nontrivially palindromic in base 14.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81993025 + 4875264 = 9055^2 + 2208^2 .

It is a cyclic number.

It is not a de Polignac number, because 86868289 - 2³ = 86868281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86868281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43434144 + 43434145.

It is an arithmetic number, because the mean of its divisors is an integer number (43434145).

Almost surely, 2^86868289 is an apocalyptic number.

It is an amenable number.

86868289 is a deficient number, since it is larger than the sum of its proper divisors (1).

86868289 is an equidigital number, since it uses as much as digits as its factorization.

86868289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2654208, while the sum is 55.

The square root of 86868289 is about 9320.3159281218. The cubic root of 86868289 is about 442.8810409134.

The spelling of 86868289 in words is "eighty-six million, eight hundred sixty-eight thousand, two hundred eighty-nine".