205859153 has 2 divisors, whose sum is σ = 205859154. Its totient is φ = 205859152.

The previous prime is 205859149. The next prime is 205859179. The reversal of 205859153 is 351958502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205406224 + 452929 = 14332^2 + 673^2 .

It is a cyclic number.

It is not a de Polignac number, because 205859153 - 2² = 205859149 is a prime.

It is not a weakly prime, because it can be changed into another prime (205859183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102929576 + 102929577.

It is an arithmetic number, because the mean of its divisors is an integer number (102929577).

Almost surely, 2^205859153 is an apocalyptic number.

It is an amenable number.

205859153 is a deficient number, since it is larger than the sum of its proper divisors (1).

205859153 is an equidigital number, since it uses as much as digits as its factorization.

205859153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 38.

The square root of 205859153 is about 14347.7926176816. The cubic root of 205859153 is about 590.4594267011.

The spelling of 205859153 in words is "two hundred five million, eight hundred fifty-nine thousand, one hundred fifty-three".