86085921 has 4 divisors (see below), whose sum is σ = 114781232. Its totient is φ = 57390612.

The previous prime is 86085919. The next prime is 86085929. The reversal of 86085921 is 12958068.

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 86085921 - 2¹ = 86085919 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 86085921.

It is not an unprimeable number, because it can be changed into a prime (86085929) 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, 14347651 + ... + 14347656.

It is an arithmetic number, because the mean of its divisors is an integer number (28695308).

Almost surely, 2^86085921 is an apocalyptic number.

It is an amenable number.

86085921 is a deficient number, since it is larger than the sum of its proper divisors (28695311).

86085921 is a wasteful number, since it uses less digits than its factorization.

86085921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28695310.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 86085921 is about 9278.2498888530. The cubic root of 86085921 is about 441.5474456582.

The spelling of 86085921 in words is "eighty-six million, eighty-five thousand, nine hundred twenty-one".