2291889 has 8 divisors (see below), whose sum is σ = 3235680. Its totient is φ = 1438016.

The previous prime is 2291867. The next prime is 2291893. The reversal of 2291889 is 9881922.

2291889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2291889 - 2¹¹ = 2289841 is a prime.

It is a super-5 number, since 5×2291889⁵ (a number of 33 digits) contains 55555 as substring.

It is a Curzon number.

2291889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2291189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22419 + ... + 22520.

It is an arithmetic number, because the mean of its divisors is an integer number (404460).

2^2291889 is an apocalyptic number.

It is an amenable number.

2291889 is a deficient number, since it is larger than the sum of its proper divisors (943791).

2291889 is a wasteful number, since it uses less digits than its factorization.

2291889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44959.

The product of its digits is 20736, while the sum is 39.

The square root of 2291889 is about 1513.8986095509. The cubic root of 2291889 is about 131.8452617445.

The spelling of 2291889 in words is "two million, two hundred ninety-one thousand, eight hundred eighty-nine".