1944013 has 2 divisors, whose sum is σ = 1944014. Its totient is φ = 1944012.

The previous prime is 1944011. The next prime is 1944049. The reversal of 1944013 is 3104491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1605289 + 338724 = 1267^2 + 582^2 .

It is a cyclic number.

It is not a de Polignac number, because 1944013 - 2¹ = 1944011 is a prime.

Together with 1944011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1944011) 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, 972006 + 972007.

It is an arithmetic number, because the mean of its divisors is an integer number (972007).

2^1944013 is an apocalyptic number.

It is an amenable number.

1944013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1944013 is an equidigital number, since it uses as much as digits as its factorization.

1944013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1944013 is about 1394.2786665513. The cubic root of 1944013 is about 124.8053075830.

The spelling of 1944013 in words is "one million, nine hundred forty-four thousand, thirteen".