1838143 has 2 divisors, whose sum is σ = 1838144. Its totient is φ = 1838142.

The previous prime is 1838141. The next prime is 1838167. The reversal of 1838143 is 3418381.

It is a weak prime.

It is an emirp because it is prime and its reverse (3418381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1838143 - 2¹ = 1838141 is a prime.

Together with 1838141, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

1838143 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1838141) 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 as a sum of consecutive naturals, namely, 919071 + 919072.

It is an arithmetic number, because the mean of its divisors is an integer number (919072).

2^1838143 is an apocalyptic number.

1838143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838143 is an equidigital number, since it uses as much as digits as its factorization.

1838143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 1838143 is about 1355.7813245505. The cubic root of 1838143 is about 122.4972760744.

The spelling of 1838143 in words is "one million, eight hundred thirty-eight thousand, one hundred forty-three".