209611013 has 2 divisors, whose sum is σ = 209611014. Its totient is φ = 209611012.

The previous prime is 209611007. The next prime is 209611019. The reversal of 209611013 is 310116902.

It is a happy number.

209611013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (209611007) and next prime (209611019).

It can be written as a sum of positive squares in only one way, i.e., 206008609 + 3602404 = 14353^2 + 1898^2 .

It is a cyclic number.

It is not a de Polignac number, because 209611013 - 2⁸ = 209610757 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 209611013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209611019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104805506 + 104805507.

It is an arithmetic number, because the mean of its divisors is an integer number (104805507).

Almost surely, 2^209611013 is an apocalyptic number.

It is an amenable number.

209611013 is a deficient number, since it is larger than the sum of its proper divisors (1).

209611013 is an equidigital number, since it uses as much as digits as its factorization.

209611013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 209611013 is about 14477.9491986952. The cubic root of 209611013 is about 594.0249671133.

Adding to 209611013 its reverse (310116902), we get a palindrome (519727915).

The spelling of 209611013 in words is "two hundred nine million, six hundred eleven thousand, thirteen".