8393621 has 4 divisors (see below), whose sum is σ = 8436000. Its totient is φ = 8351244.

The previous prime is 8393603. The next prime is 8393629. The reversal of 8393621 is 1263938.

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 8393621 - 2¹⁰ = 8392597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8393629) 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, 20891 + ... + 21288.

It is an arithmetic number, because the mean of its divisors is an integer number (2109000).

Almost surely, 2^8393621 is an apocalyptic number.

It is an amenable number.

8393621 is a deficient number, since it is larger than the sum of its proper divisors (42379).

8393621 is a wasteful number, since it uses less digits than its factorization.

8393621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42378.

The product of its digits is 7776, while the sum is 32.

The square root of 8393621 is about 2897.1746581799. The cubic root of 8393621 is about 203.2278012497.

The spelling of 8393621 in words is "eight million, three hundred ninety-three thousand, six hundred twenty-one".