205961893 has 2 divisors, whose sum is σ = 205961894. Its totient is φ = 205961892.

The previous prime is 205961879. The next prime is 205961909. The reversal of 205961893 is 398169502.

It is a happy number.

205961893 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., 161366209 + 44595684 = 12703^2 + 6678^2 .

It is a cyclic number.

It is not a de Polignac number, because 205961893 - 2⁹ = 205961381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205961813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102980946 + 102980947.

It is an arithmetic number, because the mean of its divisors is an integer number (102980947).

Almost surely, 2^205961893 is an apocalyptic number.

It is an amenable number.

205961893 is a deficient number, since it is larger than the sum of its proper divisors (1).

205961893 is an equidigital number, since it uses as much as digits as its factorization.

205961893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 205961893 is about 14351.3725127599. The cubic root of 205961893 is about 590.5576390167.

The spelling of 205961893 in words is "two hundred five million, nine hundred sixty-one thousand, eight hundred ninety-three".