209120503 has 2 divisors, whose sum is σ = 209120504. Its totient is φ = 209120502.

The previous prime is 209120491. The next prime is 209120507. The reversal of 209120503 is 305021902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 209120503 - 2²⁵ = 175566071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209120507) 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, 104560251 + 104560252.

It is an arithmetic number, because the mean of its divisors is an integer number (104560252).

Almost surely, 2^209120503 is an apocalyptic number.

209120503 is a deficient number, since it is larger than the sum of its proper divisors (1).

209120503 is an equidigital number, since it uses as much as digits as its factorization.

209120503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 209120503 is about 14460.9993776364. Note that the first 3 decimals coincide. The cubic root of 209120503 is about 593.5612466239.

The spelling of 209120503 in words is "two hundred nine million, one hundred twenty thousand, five hundred three".