86799689 has 2 divisors, whose sum is σ = 86799690. Its totient is φ = 86799688.

The previous prime is 86799667. The next prime is 86799709. The reversal of 86799689 is 98699768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72812089 + 13987600 = 8533^2 + 3740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86799689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86799649) 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 as a sum of consecutive naturals, namely, 43399844 + 43399845.

It is an arithmetic number, because the mean of its divisors is an integer number (43399845).

Almost surely, 2^86799689 is an apocalyptic number.

It is an amenable number.

86799689 is a deficient number, since it is larger than the sum of its proper divisors (1).

86799689 is an equidigital number, since it uses as much as digits as its factorization.

86799689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 62.

The square root of 86799689 is about 9316.6350685213. The cubic root of 86799689 is about 442.7644289685.

The spelling of 86799689 in words is "eighty-six million, seven hundred ninety-nine thousand, six hundred eighty-nine".