86651609 has 12 divisors (see below), whose sum is σ = 100260720. Its totient is φ = 74626200.

The previous prime is 86651599. The next prime is 86651611. The reversal of 86651609 is 90615668.

It is not a de Polignac number, because 86651609 - 2²⁴ = 69874393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86651629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16547 + ... + 21144.

It is an arithmetic number, because the mean of its divisors is an integer number (8355060).

Almost surely, 2^86651609 is an apocalyptic number.

It is an amenable number.

86651609 is a deficient number, since it is larger than the sum of its proper divisors (13609111).

86651609 is a wasteful number, since it uses less digits than its factorization.

86651609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37732 (or 37721 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 86651609 is about 9308.6846009520. The cubic root of 86651609 is about 442.5125007374.

The spelling of 86651609 in words is "eighty-six million, six hundred fifty-one thousand, six hundred nine".