19444001 has 2 divisors, whose sum is σ = 19444002. Its totient is φ = 19444000.

The previous prime is 19443961. The next prime is 19444013. The reversal of 19444001 is 10044491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17648401 + 1795600 = 4201^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 19444001 - 2¹⁰ = 19442977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19444021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9722000 + 9722001.

It is an arithmetic number, because the mean of its divisors is an integer number (9722001).

Almost surely, 2^19444001 is an apocalyptic number.

It is an amenable number.

19444001 is a deficient number, since it is larger than the sum of its proper divisors (1).

19444001 is an equidigital number, since it uses as much as digits as its factorization.

19444001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 19444001 is about 4409.5352362806. The cubic root of 19444001 is about 268.9027301334.

Adding to 19444001 its reverse (10044491), we get a palindrome (29488492).

The spelling of 19444001 in words is "nineteen million, four hundred forty-four thousand, one".