86211089 has 2 divisors, whose sum is σ = 86211090. Its totient is φ = 86211088.

The previous prime is 86211079. The next prime is 86211091. The reversal of 86211089 is 98011268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75550864 + 10660225 = 8692^2 + 3265^2 .

It is a cyclic number.

It is not a de Polignac number, because 86211089 - 2²⁰ = 85162513 is a prime.

Together with 86211091, 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 (86211079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43105544 + 43105545.

It is an arithmetic number, because the mean of its divisors is an integer number (43105545).

Almost surely, 2^86211089 is an apocalyptic number.

It is an amenable number.

86211089 is a deficient number, since it is larger than the sum of its proper divisors (1).

86211089 is an equidigital number, since it uses as much as digits as its factorization.

86211089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 86211089 is about 9284.9926763568. The cubic root of 86211089 is about 441.7613437632.

The spelling of 86211089 in words is "eighty-six million, two hundred eleven thousand, eighty-nine".