205029859 has 2 divisors, whose sum is σ = 205029860. Its totient is φ = 205029858.

The previous prime is 205029857. The next prime is 205029863. The reversal of 205029859 is 958920502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205029859 - 2¹ = 205029857 is a prime.

Together with 205029857, 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 (205029857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102514929 + 102514930.

It is an arithmetic number, because the mean of its divisors is an integer number (102514930).

Almost surely, 2^205029859 is an apocalyptic number.

205029859 is a deficient number, since it is larger than the sum of its proper divisors (1).

205029859 is an equidigital number, since it uses as much as digits as its factorization.

205029859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 205029859 is about 14318.8637468201. The cubic root of 205029859 is about 589.6654801956.

The spelling of 205029859 in words is "two hundred five million, twenty-nine thousand, eight hundred fifty-nine".