1916443 has 2 divisors, whose sum is σ = 1916444. Its totient is φ = 1916442.

The previous prime is 1916423. The next prime is 1916471. The reversal of 1916443 is 3446191.

It is an a-pointer prime, because the next prime (1916471) can be obtained adding 1916443 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1916443 - 2⁹ = 1915931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1916413) 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, 958221 + 958222.

It is an arithmetic number, because the mean of its divisors is an integer number (958222).

2^1916443 is an apocalyptic number.

1916443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1916443 is an equidigital number, since it uses as much as digits as its factorization.

1916443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 1916443 is about 1384.3565292222. The cubic root of 1916443 is about 124.2124998332.

The spelling of 1916443 in words is "one million, nine hundred sixteen thousand, four hundred forty-three".