8090921 has 4 divisors (see below), whose sum is σ = 8101200. Its totient is φ = 8080644.

The previous prime is 8090911. The next prime is 8090933. The reversal of 8090921 is 1290908.

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 8090921 - 2¹⁴ = 8074537 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 (8090911) 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, 3851 + ... + 5568.

It is an arithmetic number, because the mean of its divisors is an integer number (2025300).

Almost surely, 2^8090921 is an apocalyptic number.

It is an amenable number.

8090921 is a deficient number, since it is larger than the sum of its proper divisors (10279).

8090921 is an equidigital number, since it uses as much as digits as its factorization.

8090921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10278.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 8090921 is about 2844.4544292359. The cubic root of 8090921 is about 200.7548226301.

The spelling of 8090921 in words is "eight million, ninety thousand, nine hundred twenty-one".