209450473 has 2 divisors, whose sum is σ = 209450474. Its totient is φ = 209450472.

The previous prime is 209450429. The next prime is 209450491. The reversal of 209450473 is 374054902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209323024 + 127449 = 14468^2 + 357^2 .

It is a cyclic number.

It is not a de Polignac number, because 209450473 - 2¹⁷ = 209319401 is a prime.

It is not a weakly prime, because it can be changed into another prime (209450173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104725236 + 104725237.

It is an arithmetic number, because the mean of its divisors is an integer number (104725237).

Almost surely, 2^209450473 is an apocalyptic number.

It is an amenable number.

209450473 is a deficient number, since it is larger than the sum of its proper divisors (1).

209450473 is an equidigital number, since it uses as much as digits as its factorization.

209450473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 209450473 is about 14472.4038431768. The cubic root of 209450473 is about 593.8732748212.

The spelling of 209450473 in words is "two hundred nine million, four hundred fifty thousand, four hundred seventy-three".