86520731 has 8 divisors (see below), whose sum is σ = 94456128. Its totient is φ = 78597000.

The previous prime is 86520713. The next prime is 86520739. The reversal of 86520731 is 13702568.

It is a happy number.

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 86520731 - 2¹⁸ = 86258587 is a prime.

It is a super-3 number, since 3×86520731³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86520739) 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 in 7 ways as a sum of consecutive naturals, for example, 21596 + ... + 25286.

It is an arithmetic number, because the mean of its divisors is an integer number (11807016).

Almost surely, 2^86520731 is an apocalyptic number.

86520731 is a deficient number, since it is larger than the sum of its proper divisors (7935397).

86520731 is a wasteful number, since it uses less digits than its factorization.

86520731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5833.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 86520731 is about 9301.6520575648. The cubic root of 86520731 is about 442.2895991878.

The spelling of 86520731 in words is "eighty-six million, five hundred twenty thousand, seven hundred thirty-one".