1919441 has 2 divisors, whose sum is σ = 1919442. Its totient is φ = 1919440.

The previous prime is 1919431. The next prime is 1919459. The reversal of 1919441 is 1449191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1690000 + 229441 = 1300^2 + 479^2 .

It is an emirp because it is prime and its reverse (1449191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1919441 - 2⁶ = 1919377 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1919431) 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, 959720 + 959721.

It is an arithmetic number, because the mean of its divisors is an integer number (959721).

2^1919441 is an apocalyptic number.

It is an amenable number.

1919441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919441 is an equidigital number, since it uses as much as digits as its factorization.

1919441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 29.

The square root of 1919441 is about 1385.4389196208. The cubic root of 1919441 is about 124.2772369634.

The spelling of 1919441 in words is "one million, nine hundred nineteen thousand, four hundred forty-one".