2189873 has 4 divisors (see below), whose sum is σ = 2502720. Its totient is φ = 1877028.

The previous prime is 2189867. The next prime is 2189879. The reversal of 2189873 is 3789812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2189867) and next prime (2189879).

It is a cyclic number.

It is not a de Polignac number, because 2189873 - 2¹⁸ = 1927729 is a prime.

It is a super-2 number, since 2×2189873² = 9591087512258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2189879) 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, 156413 + ... + 156426.

It is an arithmetic number, because the mean of its divisors is an integer number (625680).

2^2189873 is an apocalyptic number.

It is an amenable number.

2189873 is a deficient number, since it is larger than the sum of its proper divisors (312847).

2189873 is an equidigital number, since it uses as much as digits as its factorization.

2189873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312846.

The product of its digits is 24192, while the sum is 38.

The square root of 2189873 is about 1479.8219487492. The cubic root of 2189873 is about 129.8592757296.

The spelling of 2189873 in words is "two million, one hundred eighty-nine thousand, eight hundred seventy-three".