86539809 has 8 divisors (see below), whose sum is σ = 122173920. Its totient is φ = 54299456.

The previous prime is 86539801. The next prime is 86539829. The reversal of 86539809 is 90893568.

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

It is a cyclic number.

It is not a de Polignac number, because 86539809 - 2³ = 86539801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86539801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848379 + ... + 848480.

It is an arithmetic number, because the mean of its divisors is an integer number (15271740).

Almost surely, 2^86539809 is an apocalyptic number.

It is an amenable number.

86539809 is a deficient number, since it is larger than the sum of its proper divisors (35634111).

86539809 is a wasteful number, since it uses less digits than its factorization.

86539809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696879.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 86539809 is about 9302.6775177902. The cubic root of 86539809 is about 442.3221053889.

The spelling of 86539809 in words is "eighty-six million, five hundred thirty-nine thousand, eight hundred nine".