1840939 has 2 divisors, whose sum is σ = 1840940. Its totient is φ = 1840938.

The previous prime is 1840921. The next prime is 1840957. The reversal of 1840939 is 9390481.

It is a balanced prime because it is at equal distance from previous prime (1840921) and next prime (1840957).

It is an emirp because it is prime and its reverse (9390481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1840939 is a prime.

1840939 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1844939) 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, 920469 + 920470.

It is an arithmetic number, because the mean of its divisors is an integer number (920470).

2^1840939 is an apocalyptic number.

1840939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840939 is an equidigital number, since it uses as much as digits as its factorization.

1840939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1840939 is about 1356.8120724699. The cubic root of 1840939 is about 122.5593548264.

The spelling of 1840939 in words is "one million, eight hundred forty thousand, nine hundred thirty-nine".