205012369 has 2 divisors, whose sum is σ = 205012370. Its totient is φ = 205012368.

The previous prime is 205012343. The next prime is 205012391. The reversal of 205012369 is 963210502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166074769 + 38937600 = 12887^2 + 6240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205012369 is a prime.

It is a super-2 number, since 2×205012369² = 84060142885984322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (205012309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102506184 + 102506185.

It is an arithmetic number, because the mean of its divisors is an integer number (102506185).

Almost surely, 2^205012369 is an apocalyptic number.

It is an amenable number.

205012369 is a deficient number, since it is larger than the sum of its proper divisors (1).

205012369 is an equidigital number, since it uses as much as digits as its factorization.

205012369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 205012369 is about 14318.2530009775. The cubic root of 205012369 is about 589.6487126500.

The spelling of 205012369 in words is "two hundred five million, twelve thousand, three hundred sixty-nine".