209628103 has 2 divisors, whose sum is σ = 209628104. Its totient is φ = 209628102.

The previous prime is 209628077. The next prime is 209628113. The reversal of 209628103 is 301826902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 209628103 - 2⁹ = 209627591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209628113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104814051 + 104814052.

It is an arithmetic number, because the mean of its divisors is an integer number (104814052).

Almost surely, 2^209628103 is an apocalyptic number.

209628103 is a deficient number, since it is larger than the sum of its proper divisors (1).

209628103 is an equidigital number, since it uses as much as digits as its factorization.

209628103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 209628103 is about 14478.5393945660. The cubic root of 209628103 is about 594.0411106843.

The spelling of 209628103 in words is "two hundred nine million, six hundred twenty-eight thousand, one hundred three".