8005590921 has 8 divisors (see below), whose sum is σ = 11302010784. Its totient is φ = 5023115840.

The previous prime is 8005590893. The next prime is 8005590937. The reversal of 8005590921 is 1290955008.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8005590921 - 2⁵ = 8005590889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8005590921.

It is not an unprimeable number, because it can be changed into a prime (8005590961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78486135 + ... + 78486236.

It is an arithmetic number, because the mean of its divisors is an integer number (1412751348).

Almost surely, 2^8005590921 is an apocalyptic number.

It is an amenable number.

8005590921 is a deficient number, since it is larger than the sum of its proper divisors (3296419863).

8005590921 is a wasteful number, since it uses less digits than its factorization.

8005590921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156972391.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 8005590921 is about 89473.9678398136. The cubic root of 8005590921 is about 2000.4658015894.

The spelling of 8005590921 in words is "eight billion, five million, five hundred ninety thousand, nine hundred twenty-one".