1839242189 has 4 divisors (see below), whose sum is σ = 1947432924. Its totient is φ = 1731051456.

The previous prime is 1839242159. The next prime is 1839242203. The reversal of 1839242189 is 9812429381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1080239689 + 759002500 = 32867^2 + 27550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1839242189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1839242159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54095342 + ... + 54095375.

It is an arithmetic number, because the mean of its divisors is an integer number (486858231).

Almost surely, 2^1839242189 is an apocalyptic number.

It is an amenable number.

1839242189 is a deficient number, since it is larger than the sum of its proper divisors (108190735).

1839242189 is a wasteful number, since it uses less digits than its factorization.

1839242189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108190734.

The product of its digits is 248832, while the sum is 47.

The square root of 1839242189 is about 42886.3869893466. The cubic root of 1839242189 is about 1225.2168854356.

The spelling of 1839242189 in words is "one billion, eight hundred thirty-nine million, two hundred forty-two thousand, one hundred eighty-nine".