19441 has 2 divisors, whose sum is σ = 19442. Its totient is φ = 19440.

The previous prime is 19433. The next prime is 19447. The reversal of 19441 is 14491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14400 + 5041 = 120^2 + 71^2 .

It is a cyclic number.

It is not a de Polignac number, because 19441 - 2³ = 19433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9720 + 9721.

It is an arithmetic number, because the mean of its divisors is an integer number (9721).

2¹⁹⁴⁴¹ is an apocalyptic number.

19441 is the 81-st hex number.

It is an amenable number.

19441 is a deficient number, since it is larger than the sum of its proper divisors (1).

19441 is an equidigital number, since it uses as much as digits as its factorization.

19441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 19441 is about 139.4309865130. The cubic root of 19441 is about 26.8888895213. Note that the first 5 decimals are identical.

Subtracting from 19441 its reverse (14491), we obtain a triangular number (4950 = T₉₉).

The spelling of 19441 in words is "nineteen thousand, four hundred forty-one".