205394369 has 2 divisors, whose sum is σ = 205394370. Its totient is φ = 205394368.

The previous prime is 205394341. The next prime is 205394377. The reversal of 205394369 is 963493502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146289025 + 59105344 = 12095^2 + 7688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205394369 is a prime.

It is a super-2 number, since 2×205394369² = 84373693633816322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (205394309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102697184 + 102697185.

It is an arithmetic number, because the mean of its divisors is an integer number (102697185).

Almost surely, 2^205394369 is an apocalyptic number.

It is an amenable number.

205394369 is a deficient number, since it is larger than the sum of its proper divisors (1).

205394369 is an equidigital number, since it uses as much as digits as its factorization.

205394369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 205394369 is about 14331.5864090477. The cubic root of 205394369 is about 590.0147166682.

The spelling of 205394369 in words is "two hundred five million, three hundred ninety-four thousand, three hundred sixty-nine".