2143889 has 4 divisors (see below), whose sum is σ = 2338800. Its totient is φ = 1948980.

The previous prime is 2143877. The next prime is 2143901. The reversal of 2143889 is 9883412.

It is a happy number.

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 (2143877) and next prime (2143901).

It is not a de Polignac number, because 2143889 - 2⁴ = 2143873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143829) 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, 97439 + ... + 97460.

It is an arithmetic number, because the mean of its divisors is an integer number (584700).

2^2143889 is an apocalyptic number.

It is an amenable number.

2143889 is a deficient number, since it is larger than the sum of its proper divisors (194911).

2143889 is a wasteful number, since it uses less digits than its factorization.

2143889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194910.

The product of its digits is 13824, while the sum is 35.

The square root of 2143889 is about 1464.2025133157. The cubic root of 2143889 is about 128.9438892242.

The spelling of 2143889 in words is "two million, one hundred forty-three thousand, eight hundred eighty-nine".