86799999 has 64 divisors (see below), whose sum is σ = 149667840. Its totient is φ = 43908480.

The previous prime is 86799991. The next prime is 86800001. The reversal of 86799999 is 99999768.

It is not a de Polignac number, because 86799999 - 2³ = 86799991 is a prime.

86799999 is a modest number, since divided by 9999 gives 8679 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86799991) 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 63 ways as a sum of consecutive naturals, for example, 187242 + ... + 187704.

It is an arithmetic number, because the mean of its divisors is an integer number (2338560).

Almost surely, 2^86799999 is an apocalyptic number.

86799999 is a deficient number, since it is larger than the sum of its proper divisors (62867841).

86799999 is a wasteful number, since it uses less digits than its factorization.

86799999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532.

The product of its digits is 19840464, while the sum is 66.

The square root of 86799999 is about 9316.6517054143. The cubic root of 86799999 is about 442.7649560703.

The spelling of 86799999 in words is "eighty-six million, seven hundred ninety-nine thousand, nine hundred ninety-nine".