1843139 has 2 divisors, whose sum is σ = 1843140. Its totient is φ = 1843138.

The previous prime is 1843129. The next prime is 1843141. The reversal of 1843139 is 9313481.

It is a strong prime.

It is an emirp because it is prime and its reverse (9313481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1843139 is a prime.

It is a super-2 number, since 2×1843139² = 6794322746642, which contains 22 as substring.

Together with 1843141, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (1843129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921569 + 921570.

It is an arithmetic number, because the mean of its divisors is an integer number (921570).

2^1843139 is an apocalyptic number.

1843139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1843139 is an equidigital number, since it uses as much as digits as its factorization.

1843139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 1843139 is about 1357.6225543206. The cubic root of 1843139 is about 122.6081565964.

The spelling of 1843139 in words is "one million, eight hundred forty-three thousand, one hundred thirty-nine".