209101253 has 2 divisors, whose sum is σ = 209101254. Its totient is φ = 209101252.

The previous prime is 209101247. The next prime is 209101267. The reversal of 209101253 is 352101902.

209101253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142874209 + 66227044 = 11953^2 + 8138^2 .

It is a cyclic number.

It is not a de Polignac number, because 209101253 - 2⁴ = 209101237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209109253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104550626 + 104550627.

It is an arithmetic number, because the mean of its divisors is an integer number (104550627).

Almost surely, 2^209101253 is an apocalyptic number.

It is an amenable number.

209101253 is a deficient number, since it is larger than the sum of its proper divisors (1).

209101253 is an equidigital number, since it uses as much as digits as its factorization.

209101253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 209101253 is about 14460.3337789969. Note that the first 3 decimals coincide. The cubic root of 209101253 is about 593.5430331944.

The spelling of 209101253 in words is "two hundred nine million, one hundred one thousand, two hundred fifty-three".