86621 has 8 divisors (see below), whose sum is σ = 94080. Its totient is φ = 79488.

The previous prime is 86599. The next prime is 86627. The reversal of 86621 is 12668.

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 86621 - 2¹⁰ = 85597 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86627) 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, 845 + ... + 941.

It is an arithmetic number, because the mean of its divisors is an integer number (11760).

2⁸⁶⁶²¹ is an apocalyptic number.

It is an amenable number.

86621 is a deficient number, since it is larger than the sum of its proper divisors (7459).

86621 is a wasteful number, since it uses less digits than its factorization.

86621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163.

The product of its digits is 576, while the sum is 23.

The square root of 86621 is about 294.3144576809. The cubic root of 86621 is about 44.2460389913.

It can be divided in two parts, 86 and 621, that added together give a palindrome (707).

The spelling of 86621 in words is "eighty-six thousand, six hundred twenty-one".