8993621 has 16 divisors (see below), whose sum is σ = 11553024. Its totient is φ = 6804864.

The previous prime is 8993609. The next prime is 8993681. The reversal of 8993621 is 1263998.

8993621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 8993621 - 2¹⁸ = 8731477 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8993681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56 + ... + 4241.

It is an arithmetic number, because the mean of its divisors is an integer number (722064).

Almost surely, 2^8993621 is an apocalyptic number.

It is an amenable number.

8993621 is a deficient number, since it is larger than the sum of its proper divisors (2559403).

8993621 is a wasteful number, since it uses less digits than its factorization.

8993621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4340.

The product of its digits is 23328, while the sum is 38.

The square root of 8993621 is about 2998.9366448793. The cubic root of 8993621 is about 207.9592267836.

The spelling of 8993621 in words is "eight million, nine hundred ninety-three thousand, six hundred twenty-one".