209240803 has 2 divisors, whose sum is σ = 209240804. Its totient is φ = 209240802.

The previous prime is 209240783. The next prime is 209240819. The reversal of 209240803 is 308042902.

209240803 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-209240803 is a prime.

It is not a weakly prime, because it can be changed into another prime (209240833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104620401 + 104620402.

It is an arithmetic number, because the mean of its divisors is an integer number (104620402).

Almost surely, 2^209240803 is an apocalyptic number.

209240803 is a deficient number, since it is larger than the sum of its proper divisors (1).

209240803 is an equidigital number, since it uses as much as digits as its factorization.

209240803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 209240803 is about 14465.1582431718. The cubic root of 209240803 is about 593.6750434204.

The spelling of 209240803 in words is "two hundred nine million, two hundred forty thousand, eight hundred three".