205042952797 has 2 divisors, whose sum is σ = 205042952798. Its totient is φ = 205042952796.

The previous prime is 205042952759. The next prime is 205042952819. The reversal of 205042952797 is 797259240502.

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., 204212706201 + 830246596 = 451899^2 + 28814^2 .

It is a cyclic number.

It is not a de Polignac number, because 205042952797 - 2²⁷ = 204908735069 is a prime.

It is a super-2 number, since 2×205042952797² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205042922797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102521476398 + 102521476399.

It is an arithmetic number, because the mean of its divisors is an integer number (102521476399).

Almost surely, 2^205042952797 is an apocalyptic number.

It is an amenable number.

205042952797 is a deficient number, since it is larger than the sum of its proper divisors (1).

205042952797 is an equidigital number, since it uses as much as digits as its factorization.

205042952797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 205042952797 in words is "two hundred five billion, forty-two million, nine hundred fifty-two thousand, seven hundred ninety-seven".