205894193 has 2 divisors, whose sum is σ = 205894194. Its totient is φ = 205894192.

The previous prime is 205894187. The next prime is 205894201. The reversal of 205894193 is 391498502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124389409 + 81504784 = 11153^2 + 9028^2 .

It is a cyclic number.

It is not a de Polignac number, because 205894193 - 2⁴ = 205894177 is a prime.

It is a super-2 number, since 2×205894193² = 84784837422242498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 205894193.

It is not a weakly prime, because it can be changed into another prime (205834193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102947096 + 102947097.

It is an arithmetic number, because the mean of its divisors is an integer number (102947097).

Almost surely, 2^205894193 is an apocalyptic number.

It is an amenable number.

205894193 is a deficient number, since it is larger than the sum of its proper divisors (1).

205894193 is an equidigital number, since it uses as much as digits as its factorization.

205894193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 205894193 is about 14349.0136594820. The cubic root of 205894193 is about 590.4929261824.

The spelling of 205894193 in words is "two hundred five million, eight hundred ninety-four thousand, one hundred ninety-three".