86724559 has 16 divisors (see below), whose sum is σ = 93954240. Its totient is φ = 79833600.

The previous prime is 86724523. The next prime is 86724563. The reversal of 86724559 is 95542768.

It is a cyclic number.

It is not a de Polignac number, because 86724559 - 2⁷ = 86724431 is a prime.

It is a super-2 number, since 2×86724559² = 15042298267488962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86724509) 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, 85447 + ... + 86455.

It is an arithmetic number, because the mean of its divisors is an integer number (5872140).

Almost surely, 2^86724559 is an apocalyptic number.

86724559 is a deficient number, since it is larger than the sum of its proper divisors (7229681).

86724559 is a wasteful number, since it uses less digits than its factorization.

86724559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170.

The product of its digits is 604800, while the sum is 46.

The square root of 86724559 is about 9312.6021605135. The cubic root of 86724559 is about 442.6366462768.

It can be divided in two parts, 8672 and 4559, that added together give a palindrome (13231).

The spelling of 86724559 in words is "eighty-six million, seven hundred twenty-four thousand, five hundred fifty-nine".