86724591 has 8 divisors (see below), whose sum is σ = 115977264. Its totient is φ = 57644160.

The previous prime is 86724571. The next prime is 86724601. The reversal of 86724591 is 19542768.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86724591 - 2¹⁸ = 86462447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86724571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41880 + ... + 43901.

It is an arithmetic number, because the mean of its divisors is an integer number (14497158).

Almost surely, 2^86724591 is an apocalyptic number.

86724591 is a deficient number, since it is larger than the sum of its proper divisors (29252673).

86724591 is a wasteful number, since it uses less digits than its factorization.

86724591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86121.

The product of its digits is 120960, while the sum is 42.

The square root of 86724591 is about 9312.6038786153. The cubic root of 86724591 is about 442.6367007188.

The spelling of 86724591 in words is "eighty-six million, seven hundred twenty-four thousand, five hundred ninety-one".