8333921 has 4 divisors (see below), whose sum is σ = 8376000. Its totient is φ = 8291844.

The previous prime is 8333911. The next prime is 8333957. The reversal of 8333921 is 1293338.

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 an emirpimes, since its reverse is a distinct semiprime: 1293338 = 2 ⋅646669.

It is a cyclic number.

It is not a de Polignac number, because 8333921 - 2¹⁰ = 8332897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8333911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20741 + ... + 21138.

It is an arithmetic number, because the mean of its divisors is an integer number (2094000).

Almost surely, 2^8333921 is an apocalyptic number.

It is an amenable number.

8333921 is a deficient number, since it is larger than the sum of its proper divisors (42079).

8333921 is a wasteful number, since it uses less digits than its factorization.

8333921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42078.

The product of its digits is 3888, while the sum is 29.

The square root of 8333921 is about 2886.8531310061. The cubic root of 8333921 is about 202.7448321503.

The spelling of 8333921 in words is "eight million, three hundred thirty-three thousand, nine hundred twenty-one".