86629621 has 16 divisors (see below), whose sum is σ = 94961664. Its totient is φ = 78551424.

The previous prime is 86629579. The next prime is 86629639. The reversal of 86629621 is 12692668.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 86629621 - 2¹⁹ = 86105333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86629421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225996 + ... + 226378.

It is an arithmetic number, because the mean of its divisors is an integer number (5935104).

Almost surely, 2^86629621 is an apocalyptic number.

It is an amenable number.

86629621 is a deficient number, since it is larger than the sum of its proper divisors (8332043).

86629621 is a wasteful number, since it uses less digits than its factorization.

86629621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its digits is 62208, while the sum is 40.

The square root of 86629621 is about 9307.5034783770. The cubic root of 86629621 is about 442.4750681262.

The spelling of 86629621 in words is "eighty-six million, six hundred twenty-nine thousand, six hundred twenty-one".