2003987189 has 4 divisors (see below), whose sum is σ = 2036839500. Its totient is φ = 1971134880.

The previous prime is 2003987177. The next prime is 2003987191. The reversal of 2003987189 is 9817893002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9817893002 = 2 ⋅4908946501.

It can be written as a sum of positive squares in 2 ways, for example, as 221712100 + 1782275089 = 14890^2 + 42217^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003987189 - 2¹⁶ = 2003921653 is a prime.

It is a super-2 number, since 2×2003987189² = 8031929307352243442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003987119) 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, 16426064 + ... + 16426185.

It is an arithmetic number, because the mean of its divisors is an integer number (509209875).

Almost surely, 2^2003987189 is an apocalyptic number.

It is an amenable number.

2003987189 is a deficient number, since it is larger than the sum of its proper divisors (32852311).

2003987189 is an equidigital number, since it uses as much as digits as its factorization.

2003987189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32852310.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 2003987189 is about 44765.9154826526. The cubic root of 2003987189 is about 1260.7577513516.

The spelling of 2003987189 in words is "two billion, three million, nine hundred eighty-seven thousand, one hundred eighty-nine".