2991089 has 4 divisors (see below), whose sum is σ = 3094260. Its totient is φ = 2887920.

The previous prime is 2991083. The next prime is 2991091. The reversal of 2991089 is 9801992.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2512225 + 478864 = 1585^2 + 692^2 .

It is a cyclic number.

It is not a de Polignac number, because 2991089 - 2⁸ = 2990833 is a prime.

It is a super-2 number, since 2×2991089² = 17893226811842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2991083) 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, 51542 + ... + 51599.

It is an arithmetic number, because the mean of its divisors is an integer number (773565).

2^2991089 is an apocalyptic number.

2991089 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2991089 is a deficient number, since it is larger than the sum of its proper divisors (103171).

2991089 is a wasteful number, since it uses less digits than its factorization.

2991089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103170.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 2991089 is about 1729.4765103927. The cubic root of 2991089 is about 144.0820166779.

The spelling of 2991089 in words is "two million, nine hundred ninety-one thousand, eighty-nine".