209053961 has 2 divisors, whose sum is σ = 209053962. Its totient is φ = 209053960.

The previous prime is 209053937. The next prime is 209053991. The reversal of 209053961 is 169350902.

209053961 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., 199939600 + 9114361 = 14140^2 + 3019^2 .

It is a cyclic number.

It is not a de Polignac number, because 209053961 - 2¹⁰ = 209052937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (209053931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104526980 + 104526981.

It is an arithmetic number, because the mean of its divisors is an integer number (104526981).

Almost surely, 2^209053961 is an apocalyptic number.

It is an amenable number.

209053961 is a deficient number, since it is larger than the sum of its proper divisors (1).

209053961 is an equidigital number, since it uses as much as digits as its factorization.

209053961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 209053961 is about 14458.6984545636. The cubic root of 209053961 is about 593.4982830185.

The spelling of 209053961 in words is "two hundred nine million, fifty-three thousand, nine hundred sixty-one".