194445401 has 2 divisors, whose sum is σ = 194445402. Its totient is φ = 194445400.

The previous prime is 194445389. The next prime is 194445403. The reversal of 194445401 is 104544491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194323600 + 121801 = 13940^2 + 349^2 .

It is a cyclic number.

It is not a de Polignac number, because 194445401 - 2¹⁰ = 194444377 is a prime.

Together with 194445403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194445403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97222700 + 97222701.

It is an arithmetic number, because the mean of its divisors is an integer number (97222701).

Almost surely, 2^194445401 is an apocalyptic number.

It is an amenable number.

194445401 is a deficient number, since it is larger than the sum of its proper divisors (1).

194445401 is an equidigital number, since it uses as much as digits as its factorization.

194445401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 194445401 is about 13944.3680746027. The cubic root of 194445401 is about 579.3387241498.

Adding to 194445401 its reverse (104544491), we get a palindrome (298989892).

The spelling of 194445401 in words is "one hundred ninety-four million, four hundred forty-five thousand, four hundred one".