205116757 has 2 divisors, whose sum is σ = 205116758. Its totient is φ = 205116756.

The previous prime is 205116749. The next prime is 205116763. The reversal of 205116757 is 757611502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193515921 + 11600836 = 13911^2 + 3406^2 .

It is a cyclic number.

It is not a de Polignac number, because 205116757 - 2³ = 205116749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205146757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102558378 + 102558379.

It is an arithmetic number, because the mean of its divisors is an integer number (102558379).

Almost surely, 2^205116757 is an apocalyptic number.

It is an amenable number.

205116757 is a deficient number, since it is larger than the sum of its proper divisors (1).

205116757 is an equidigital number, since it uses as much as digits as its factorization.

205116757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 205116757 is about 14321.8978141865. The cubic root of 205116757 is about 589.7487745894.

The spelling of 205116757 in words is "two hundred five million, one hundred sixteen thousand, seven hundred fifty-seven".