86999999 has 8 divisors (see below), whose sum is σ = 92215440. Its totient is φ = 81795456.

The previous prime is 86999989. The next prime is 87000037. The reversal of 86999999 is 99999968.

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 86999999 - 2⁸ = 86999743 is a prime.

It is a Duffinian number.

86999999 is a modest number, since divided by 9999 gives 8699 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86999929) 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 7 ways as a sum of consecutive naturals, for example, 18512 + ... + 22730.

It is an arithmetic number, because the mean of its divisors is an integer number (11526930).

Almost surely, 2^86999999 is an apocalyptic number.

86999999 is a deficient number, since it is larger than the sum of its proper divisors (5215441).

86999999 is a wasteful number, since it uses less digits than its factorization.

86999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5449.

The product of its digits is 25509168, while the sum is 68.

The square root of 86999999 is about 9327.3789994832. The cubic root of 86999999 is about 443.1047604716.

It can be divided in two parts, 8 and 6999999, that added together give a palindrome (7000007).

The spelling of 86999999 in words is "eighty-six million, nine hundred ninety-nine thousand, nine hundred ninety-nine".