209480017 has 2 divisors, whose sum is σ = 209480018. Its totient is φ = 209480016.

The previous prime is 209479993. The next prime is 209480027. The reversal of 209480017 is 710084902.

209480017 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 can be written as a sum of positive squares in only one way, i.e., 154853136 + 54626881 = 12444^2 + 7391^2 .

It is a cyclic number.

It is not a de Polignac number, because 209480017 - 2⁷ = 209479889 is a prime.

It is not a weakly prime, because it can be changed into another prime (209480027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104740008 + 104740009.

It is an arithmetic number, because the mean of its divisors is an integer number (104740009).

Almost surely, 2^209480017 is an apocalyptic number.

It is an amenable number.

209480017 is a deficient number, since it is larger than the sum of its proper divisors (1).

209480017 is an equidigital number, since it uses as much as digits as its factorization.

209480017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 209480017 is about 14473.4245083878. The cubic root of 209480017 is about 593.9011964055.

The spelling of 209480017 in words is "two hundred nine million, four hundred eighty thousand, seventeen".