86529621 has 4 divisors (see below), whose sum is σ = 115372832. Its totient is φ = 57686412.

The previous prime is 86529593. The next prime is 86529697. The reversal of 86529621 is 12692568.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 86529621 - 2⁵ = 86529589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86529621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86529221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14421601 + ... + 14421606.

It is an arithmetic number, because the mean of its divisors is an integer number (28843208).

Almost surely, 2^86529621 is an apocalyptic number.

It is an amenable number.

86529621 is a deficient number, since it is larger than the sum of its proper divisors (28843211).

86529621 is a wasteful number, since it uses less digits than its factorization.

86529621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28843210.

The product of its digits is 51840, while the sum is 39.

The square root of 86529621 is about 9302.1299173899. The cubic root of 86529621 is about 442.3047470790.

The spelling of 86529621 in words is "eighty-six million, five hundred twenty-nine thousand, six hundred twenty-one".