86808309 has 16 divisors (see below), whose sum is σ = 132564480. Its totient is φ = 49497840.

The previous prime is 86808301. The next prime is 86808311. The reversal of 86808309 is 90380868.

It is not a de Polignac number, because 86808309 - 2³ = 86808301 is a prime.

It is a super-2 number, since 2×86808309² = 15071365022878962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86808301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6102 + ... + 14520.

It is an arithmetic number, because the mean of its divisors is an integer number (8285280).

Almost surely, 2^86808309 is an apocalyptic number.

It is an amenable number.

86808309 is a deficient number, since it is larger than the sum of its proper divisors (45756171).

86808309 is a wasteful number, since it uses less digits than its factorization.

86808309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8920.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 86808309 is about 9317.0976704122. The cubic root of 86808309 is about 442.7790853307.

The spelling of 86808309 in words is "eighty-six million, eight hundred eight thousand, three hundred nine".