2189139 has 4 divisors (see below), whose sum is σ = 2918856. Its totient is φ = 1459424.

The previous prime is 2189101. The next prime is 2189147. The reversal of 2189139 is 9319812.

2189139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2189139 - 2¹⁶ = 2123603 is a prime.

It is a super-2 number, since 2×2189139² = 9584659122642, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2189339) 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 3 ways as a sum of consecutive naturals, for example, 364854 + ... + 364859.

It is an arithmetic number, because the mean of its divisors is an integer number (729714).

2^2189139 is an apocalyptic number.

2189139 is a deficient number, since it is larger than the sum of its proper divisors (729717).

2189139 is an equidigital number, since it uses as much as digits as its factorization.

2189139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729716.

The product of its digits is 3888, while the sum is 33.

The square root of 2189139 is about 1479.5739251555. The cubic root of 2189139 is about 129.8447653966.

The spelling of 2189139 in words is "two million, one hundred eighty-nine thousand, one hundred thirty-nine".