86321089 has 2 divisors, whose sum is σ = 86321090. Its totient is φ = 86321088.

The previous prime is 86321077. The next prime is 86321099. The reversal of 86321089 is 98012368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58018689 + 28302400 = 7617^2 + 5320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86321089 is a prime.

It is a super-2 number, since 2×86321089² = 14902660812291842, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86321099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43160544 + 43160545.

It is an arithmetic number, because the mean of its divisors is an integer number (43160545).

Almost surely, 2^86321089 is an apocalyptic number.

It is an amenable number.

86321089 is a deficient number, since it is larger than the sum of its proper divisors (1).

86321089 is an equidigital number, since it uses as much as digits as its factorization.

86321089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 86321089 is about 9290.9143252965. The cubic root of 86321089 is about 441.9491505967.

It can be divided in two parts, 863 and 21089, that added together give a cube (21952 = 28³).

The spelling of 86321089 in words is "eighty-six million, three hundred twenty-one thousand, eighty-nine".