194545049 has 2 divisors, whose sum is σ = 194545050. Its totient is φ = 194545048.

The previous prime is 194545031. The next prime is 194545097. The reversal of 194545049 is 940545491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189255049 + 5290000 = 13757^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 194545049 - 2⁸ = 194544793 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 194544997 and 194545015.

It is not a weakly prime, because it can be changed into another prime (194545249) 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, 97272524 + 97272525.

It is an arithmetic number, because the mean of its divisors is an integer number (97272525).

Almost surely, 2^194545049 is an apocalyptic number.

It is an amenable number.

194545049 is a deficient number, since it is larger than the sum of its proper divisors (1).

194545049 is an equidigital number, since it uses as much as digits as its factorization.

194545049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 194545049 is about 13947.9406723717. The cubic root of 194545049 is about 579.4376723824.

The spelling of 194545049 in words is "one hundred ninety-four million, five hundred forty-five thousand, forty-nine".