8888921 has 4 divisors (see below), whose sum is σ = 8896512. Its totient is φ = 8881332.

The previous prime is 8888861. The next prime is 8888927. The reversal of 8888921 is 1298888.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8888921 - 2¹⁰ = 8887897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8888927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1625 + ... + 4518.

It is an arithmetic number, because the mean of its divisors is an integer number (2224128).

Almost surely, 2^8888921 is an apocalyptic number.

It is an amenable number.

8888921 is a deficient number, since it is larger than the sum of its proper divisors (7591).

8888921 is a wasteful number, since it uses less digits than its factorization.

8888921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7590.

The product of its digits is 73728, while the sum is 44.

The square root of 8888921 is about 2981.4293551919. The cubic root of 8888921 is about 207.1490831717.

The spelling of 8888921 in words is "eight million, eight hundred eighty-eight thousand, nine hundred twenty-one".