84659621 has 4 divisors (see below), whose sum is σ = 84684672. Its totient is φ = 84634572.

The previous prime is 84659599. The next prime is 84659623. The reversal of 84659621 is 12695648.

It is a happy number.

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 84659621 - 2¹⁰ = 84658597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84659623) 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, 6485 + ... + 14538.

It is an arithmetic number, because the mean of its divisors is an integer number (21171168).

Almost surely, 2^84659621 is an apocalyptic number.

It is an amenable number.

84659621 is a deficient number, since it is larger than the sum of its proper divisors (25051).

84659621 is a wasteful number, since it uses less digits than its factorization.

84659621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25050.

The product of its digits is 103680, while the sum is 41.

The square root of 84659621 is about 9201.0662969028. The cubic root of 84659621 is about 439.0952846202.

The spelling of 84659621 in words is "eighty-four million, six hundred fifty-nine thousand, six hundred twenty-one".