1843949 has 2 divisors, whose sum is σ = 1843950. Its totient is φ = 1843948.

The previous prime is 1843943. The next prime is 1843967. The reversal of 1843949 is 9493481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1841449 + 2500 = 1357^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 1843949 - 2¹² = 1839853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1843943) 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, 921974 + 921975.

It is an arithmetic number, because the mean of its divisors is an integer number (921975).

2^1843949 is an apocalyptic number.

It is an amenable number.

1843949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1843949 is an equidigital number, since it uses as much as digits as its factorization.

1843949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 1843949 is about 1357.9208371625. The cubic root of 1843949 is about 122.6261147396.

The spelling of 1843949 in words is "one million, eight hundred forty-three thousand, nine hundred forty-nine".