1839 has 4 divisors (see below), whose sum is σ = 2456.
Its totient is φ = 1224.
The previous prime is 1831. The next prime is 1847. The reversal of 1839 is 9381.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (1831) and next prime (1847).
It is not a de Polignac number, because 1839 - 23 = 1831 is a prime.
It is a D-number.
It is a Duffinian number.
1839 is a lucky number.
It is a plaindrome in base 8.
It is a nialpdrome in base 14.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1831) 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, 304 + ... + 309.
It is an arithmetic number, because the mean of its divisors is an integer number (614).
21839 is an apocalyptic number.
1839 is a deficient number, since it is larger than the sum of its proper divisors (617).
1839 is an equidigital number, since it uses as much as digits as its factorization.
1839 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 616.
The product of its digits is 216, while the sum is 21.
The square root of 1839 is about 42.8835632848.
The cubic root of 1839 is about 12.2516310476.
The spelling of 1839 in words is "one thousand, eight hundred thirty-nine".