1943243 has 2 divisors, whose sum is σ = 1943244. Its totient is φ = 1943242.

The previous prime is 1943239. The next prime is 1943251. The reversal of 1943243 is 3423491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1943243 - 2² = 1943239 is a prime.

It is not a weakly prime, because it can be changed into another prime (1943273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 971621 + 971622.

It is an arithmetic number, because the mean of its divisors is an integer number (971622).

2^1943243 is an apocalyptic number.

1943243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1943243 is an equidigital number, since it uses as much as digits as its factorization.

1943243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 26.

The square root of 1943243 is about 1394.0025107581. The cubic root of 1943243 is about 124.7888274501.

The spelling of 1943243 in words is "one million, nine hundred forty-three thousand, two hundred forty-three".