86811209 has 8 divisors (see below), whose sum is σ = 93325440. Its totient is φ = 80491536.

The previous prime is 86811187. The next prime is 86811229. The reversal of 86811209 is 90211868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86811209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86811229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47714 + ... + 49499.

It is an arithmetic number, because the mean of its divisors is an integer number (11665680).

Almost surely, 2^86811209 is an apocalyptic number.

It is an amenable number.

86811209 is a deficient number, since it is larger than the sum of its proper divisors (6514231).

86811209 is a wasteful number, since it uses less digits than its factorization.

86811209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97279.

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

The square root of 86811209 is about 9317.2532969755. The cubic root of 86811209 is about 442.7840159073.

The spelling of 86811209 in words is "eighty-six million, eight hundred eleven thousand, two hundred nine".