194445469 has 2 divisors, whose sum is σ = 194445470. Its totient is φ = 194445468.

The previous prime is 194445467. The next prime is 194445497. The reversal of 194445469 is 964544491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133402500 + 61042969 = 11550^2 + 7813^2 .

It is a cyclic number.

It is not a de Polignac number, because 194445469 - 2¹ = 194445467 is a prime.

It is a super-2 number, since 2×194445469² = 75618080829259922, which contains 22 as substring.

Together with 194445467, 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 (194445463) 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, 97222734 + 97222735.

It is an arithmetic number, because the mean of its divisors is an integer number (97222735).

Almost surely, 2^194445469 is an apocalyptic number.

It is an amenable number.

194445469 is a deficient number, since it is larger than the sum of its proper divisors (1).

194445469 is an equidigital number, since it uses as much as digits as its factorization.

194445469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 46.

The square root of 194445469 is about 13944.3705128629. The cubic root of 194445469 is about 579.3387916838.

It can be divided in two parts, 19444 and 5469, that multiplied together give a triangular number (106339236 = T₁₄₅₈₃).

The spelling of 194445469 in words is "one hundred ninety-four million, four hundred forty-five thousand, four hundred sixty-nine".