205353397 has 2 divisors, whose sum is σ = 205353398. Its totient is φ = 205353396.

The previous prime is 205353383. The next prime is 205353403. The reversal of 205353397 is 793353502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197093521 + 8259876 = 14039^2 + 2874^2 .

It is a cyclic number.

It is not a de Polignac number, because 205353397 - 2¹⁹ = 204829109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205353377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102676698 + 102676699.

It is an arithmetic number, because the mean of its divisors is an integer number (102676699).

Almost surely, 2^205353397 is an apocalyptic number.

It is an amenable number.

205353397 is a deficient number, since it is larger than the sum of its proper divisors (1).

205353397 is an equidigital number, since it uses as much as digits as its factorization.

205353397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85050, while the sum is 37.

The square root of 205353397 is about 14330.1569077244. The cubic root of 205353397 is about 589.9754820799.

It can be divided in two parts, 20535 and 3397, that added together give a palindrome (23932).

The spelling of 205353397 in words is "two hundred five million, three hundred fifty-three thousand, three hundred ninety-seven".