86459309 has 2 divisors, whose sum is σ = 86459310. Its totient is φ = 86459308.

The previous prime is 86459293. The next prime is 86459311. The reversal of 86459309 is 90395468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85562500 + 896809 = 9250^2 + 947^2 .

It is a cyclic number.

It is not a de Polignac number, because 86459309 - 2⁴ = 86459293 is a prime.

It is a super-2 number, since 2×86459309² = 14950424225514962, which contains 22 as substring.

Together with 86459311, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86459309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86459339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43229654 + 43229655.

It is an arithmetic number, because the mean of its divisors is an integer number (43229655).

Almost surely, 2^86459309 is an apocalyptic number.

It is an amenable number.

86459309 is a deficient number, since it is larger than the sum of its proper divisors (1).

86459309 is an equidigital number, since it uses as much as digits as its factorization.

86459309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 86459309 is about 9298.3497998301. The cubic root of 86459309 is about 442.1849123590.

It can be divided in two parts, 86459 and 309, that added together give a palindrome (86768).

The spelling of 86459309 in words is "eighty-six million, four hundred fifty-nine thousand, three hundred nine".