2008991 has 4 divisors (see below), whose sum is σ = 2028984. Its totient is φ = 1989000.

The previous prime is 2008973. The next prime is 2009011. The reversal of 2008991 is 1998002.

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 2008991 - 2¹⁸ = 1746847 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 (2008901) 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, 9845 + ... + 10046.

It is an arithmetic number, because the mean of its divisors is an integer number (507246).

2^2008991 is an apocalyptic number.

2008991 is a deficient number, since it is larger than the sum of its proper divisors (19993).

2008991 is a wasteful number, since it uses less digits than its factorization.

2008991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19992.

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

The square root of 2008991 is about 1417.3887963435. The cubic root of 2008991 is about 126.1806219477.

The spelling of 2008991 in words is "two million, eight thousand, nine hundred ninety-one".