8389621 has 8 divisors (see below), whose sum is σ = 8914400. Its totient is φ = 7873200.

The previous prime is 8389607. The next prime is 8389651. The reversal of 8389621 is 1269838.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 5-Lehmer number, since φ(8389621) divides (8389621-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 8389621 - 2¹⁵ = 8356853 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8389651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46 + ... + 4096.

It is an arithmetic number, because the mean of its divisors is an integer number (1114300).

Almost surely, 2^8389621 is an apocalyptic number.

It is an amenable number.

8389621 is a deficient number, since it is larger than the sum of its proper divisors (524779).

8389621 is a wasteful number, since it uses less digits than its factorization.

8389621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179.

The product of its digits is 20736, while the sum is 37.

The square root of 8389621 is about 2896.4842481878. The cubic root of 8389621 is about 203.1955132232.

The spelling of 8389621 in words is "eight million, three hundred eighty-nine thousand, six hundred twenty-one".