8008991 has 4 divisors (see below), whose sum is σ = 8357232. Its totient is φ = 7660752.

The previous prime is 8008967. The next prime is 8009003. The reversal of 8008991 is 1998008.

8008991 = T₈₂₃ + T₈₂₄ + ... + T₈₄₅.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8008991 - 2¹⁸ = 7746847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8008951) 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, 174086 + ... + 174131.

It is an arithmetic number, because the mean of its divisors is an integer number (2089308).

Almost surely, 2^8008991 is an apocalyptic number.

8008991 is a deficient number, since it is larger than the sum of its proper divisors (348241).

8008991 is a wasteful number, since it uses less digits than its factorization.

8008991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348240.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 8008991 is about 2830.0160776928. The cubic root of 8008991 is about 200.0748969487.

The spelling of 8008991 in words is "eight million, eight thousand, nine hundred ninety-one".