86989999 has 16 divisors (see below), whose sum is σ = 95431680. Its totient is φ = 78986880.

The previous prime is 86989993. The next prime is 86990011. The reversal of 86989999 is 99998968.

It is a cyclic number.

It is not a de Polignac number, because 86989999 - 2⁷ = 86989871 is a prime.

86989999 is a modest number, since divided by 9999 gives 8698 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86989993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65904 + ... + 67210.

It is an arithmetic number, because the mean of its divisors is an integer number (5964480).

Almost surely, 2^86989999 is an apocalyptic number.

86989999 is a deficient number, since it is larger than the sum of its proper divisors (8441681).

86989999 is a wasteful number, since it uses less digits than its factorization.

86989999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470.

The product of its digits is 22674816, while the sum is 67.

The square root of 86989999 is about 9326.8429278079. The cubic root of 86989999 is about 443.0877826271.

The spelling of 86989999 in words is "eighty-six million, nine hundred eighty-nine thousand, nine hundred ninety-nine".