8937921 has 4 divisors (see below), whose sum is σ = 11917232. Its totient is φ = 5958612.

The previous prime is 8937919. The next prime is 8937931. The reversal of 8937921 is 1297398.

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 not a de Polignac number, because 8937921 - 2¹ = 8937919 is a prime.

It is a Duffinian number.

It is a Curzon number.

8937921 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8937921.

It is not an unprimeable number, because it can be changed into a prime (8937931) 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, 1489651 + ... + 1489656.

It is an arithmetic number, because the mean of its divisors is an integer number (2979308).

Almost surely, 2^8937921 is an apocalyptic number.

It is an amenable number.

8937921 is a deficient number, since it is larger than the sum of its proper divisors (2979311).

8937921 is a wasteful number, since it uses less digits than its factorization.

8937921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979310.

The product of its digits is 27216, while the sum is 39.

The square root of 8937921 is about 2989.6355965234. The cubic root of 8937921 is about 207.5290209567.

The spelling of 8937921 in words is "eight million, nine hundred thirty-seven thousand, nine hundred twenty-one".