1648943 has 2 divisors, whose sum is σ = 1648944. Its totient is φ = 1648942.

The previous prime is 1648919. The next prime is 1648951. The reversal of 1648943 is 3498461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1648943 - 2⁶ = 1648879 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 (1648963) 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, 824471 + 824472.

It is an arithmetic number, because the mean of its divisors is an integer number (824472).

2^1648943 is an apocalyptic number.

1648943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1648943 is an equidigital number, since it uses as much as digits as its factorization.

1648943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 1648943 is about 1284.1117552612. Note that the first 3 decimals coincide. The cubic root of 1648943 is about 118.1413369154.

The spelling of 1648943 in words is "one million, six hundred forty-eight thousand, nine hundred forty-three".