86610921 has 4 divisors (see below), whose sum is σ = 115481232. Its totient is φ = 57740612.

The previous prime is 86610919. The next prime is 86610941. The reversal of 86610921 is 12901668.

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 a cyclic number.

It is not a de Polignac number, because 86610921 - 2¹ = 86610919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86610941) 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, 14435151 + ... + 14435156.

It is an arithmetic number, because the mean of its divisors is an integer number (28870308).

Almost surely, 2^86610921 is an apocalyptic number.

It is an amenable number.

86610921 is a deficient number, since it is larger than the sum of its proper divisors (28870311).

86610921 is a wasteful number, since it uses less digits than its factorization.

86610921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28870310.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 86610921 is about 9306.4988583248. The cubic root of 86610921 is about 442.4432280576.

The spelling of 86610921 in words is "eighty-six million, six hundred ten thousand, nine hundred twenty-one".