209948580199 has 2 divisors, whose sum is σ = 209948580200. Its totient is φ = 209948580198.

The previous prime is 209948580169. The next prime is 209948580223. The reversal of 209948580199 is 991085849902.

209948580199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209948580199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 209948580199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209948580169) 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, 104974290099 + 104974290100.

It is an arithmetic number, because the mean of its divisors is an integer number (104974290100).

Almost surely, 2^209948580199 is an apocalyptic number.

209948580199 is a deficient number, since it is larger than the sum of its proper divisors (1).

209948580199 is an equidigital number, since it uses as much as digits as its factorization.

209948580199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16796160, while the sum is 64.

The spelling of 209948580199 in words is "two hundred nine billion, nine hundred forty-eight million, five hundred eighty thousand, one hundred ninety-nine".