86309 has 4 divisors (see below), whose sum is σ = 91404. Its totient is φ = 81216.

The previous prime is 86297. The next prime is 86311. The reversal of 86309 is 90368.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77284 + 9025 = 278^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 86309 - 2⁴ = 86293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 86309.

It is not an unprimeable number, because it can be changed into a prime (86369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2522 + ... + 2555.

It is an arithmetic number, because the mean of its divisors is an integer number (22851).

2⁸⁶³⁰⁹ is an apocalyptic number.

It is an amenable number.

86309 is a deficient number, since it is larger than the sum of its proper divisors (5095).

86309 is a wasteful number, since it uses less digits than its factorization.

86309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5094.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 86309 is about 293.7839342102. The cubic root of 86309 is about 44.1928518432.

The spelling of 86309 in words is "eighty-six thousand, three hundred nine".