194442401 has 2 divisors, whose sum is σ = 194442402. Its totient is φ = 194442400.

The previous prime is 194442373. The next prime is 194442427. The reversal of 194442401 is 104244491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176252176 + 18190225 = 13276^2 + 4265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194442401 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 (194445401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97221200 + 97221201.

It is an arithmetic number, because the mean of its divisors is an integer number (97221201).

Almost surely, 2^194442401 is an apocalyptic number.

It is an amenable number.

194442401 is a deficient number, since it is larger than the sum of its proper divisors (1).

194442401 is an equidigital number, since it uses as much as digits as its factorization.

194442401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 194442401 is about 13944.2605038776. The cubic root of 194442401 is about 579.3357446928.

Adding to 194442401 its reverse (104244491), we get a palindrome (298686892).

The spelling of 194442401 in words is "one hundred ninety-four million, four hundred forty-two thousand, four hundred one".