205650449 has 2 divisors, whose sum is σ = 205650450. Its totient is φ = 205650448.

The previous prime is 205650421. The next prime is 205650451. The reversal of 205650449 is 944056502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191324224 + 14326225 = 13832^2 + 3785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205650449 is a prime.

Together with 205650451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205650149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102825224 + 102825225.

It is an arithmetic number, because the mean of its divisors is an integer number (102825225).

Almost surely, 2^205650449 is an apocalyptic number.

It is an amenable number.

205650449 is a deficient number, since it is larger than the sum of its proper divisors (1).

205650449 is an equidigital number, since it uses as much as digits as its factorization.

205650449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 205650449 is about 14340.5177382129. The cubic root of 205650449 is about 590.2598194930.

The spelling of 205650449 in words is "two hundred five million, six hundred fifty thousand, four hundred forty-nine".