209424043 has 2 divisors, whose sum is σ = 209424044. Its totient is φ = 209424042.

The previous prime is 209424013. The next prime is 209424053. The reversal of 209424043 is 340424902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 209424043 - 2⁵ = 209424011 is a prime.

It is not a weakly prime, because it can be changed into another prime (209424013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104712021 + 104712022.

It is an arithmetic number, because the mean of its divisors is an integer number (104712022).

Almost surely, 2^209424043 is an apocalyptic number.

209424043 is a deficient number, since it is larger than the sum of its proper divisors (1).

209424043 is an equidigital number, since it uses as much as digits as its factorization.

209424043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 209424043 is about 14471.4906972295. The cubic root of 209424043 is about 593.8482940056.

Adding to 209424043 its reverse (340424902), we get a palindrome (549848945).

The spelling of 209424043 in words is "two hundred nine million, four hundred twenty-four thousand, forty-three".