205161959 has 2 divisors, whose sum is σ = 205161960. Its totient is φ = 205161958.

The previous prime is 205161949. The next prime is 205161961. The reversal of 205161959 is 959161502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205161959 - 2¹² = 205157863 is a prime.

Together with 205161961, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205161949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102580979 + 102580980.

It is an arithmetic number, because the mean of its divisors is an integer number (102580980).

Almost surely, 2^205161959 is an apocalyptic number.

205161959 is a deficient number, since it is larger than the sum of its proper divisors (1).

205161959 is an equidigital number, since it uses as much as digits as its factorization.

205161959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 38.

The square root of 205161959 is about 14323.4758002379. The cubic root of 205161959 is about 589.7920927894.

The spelling of 205161959 in words is "two hundred five million, one hundred sixty-one thousand, nine hundred fifty-nine".