1840043 has 2 divisors, whose sum is σ = 1840044. Its totient is φ = 1840042.

The previous prime is 1840031. The next prime is 1840049. The reversal of 1840043 is 3400481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1840043 - 2⁸ = 1839787 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1839997 and 1840024.

It is not a weakly prime, because it can be changed into another prime (1840049) 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, 920021 + 920022.

It is an arithmetic number, because the mean of its divisors is an integer number (920022).

2^1840043 is an apocalyptic number.

1840043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840043 is an equidigital number, since it uses as much as digits as its factorization.

1840043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1840043 is about 1356.4818465427. The cubic root of 1840043 is about 122.5394680544.

The spelling of 1840043 in words is "one million, eight hundred forty thousand, forty-three".