200521669 has 2 divisors, whose sum is σ = 200521670. Its totient is φ = 200521668.

The previous prime is 200521661. The next prime is 200521721. The reversal of 200521669 is 966125002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192848769 + 7672900 = 13887^2 + 2770^2 .

It is a cyclic number.

It is not a de Polignac number, because 200521669 - 2³ = 200521661 is a prime.

It is a super-2 number, since 2×200521669² = 80417879477091122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 200521669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200521661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100260834 + 100260835.

It is an arithmetic number, because the mean of its divisors is an integer number (100260835).

Almost surely, 2^200521669 is an apocalyptic number.

It is an amenable number.

200521669 is a deficient number, since it is larger than the sum of its proper divisors (1).

200521669 is an equidigital number, since it uses as much as digits as its factorization.

200521669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 200521669 is about 14160.5673968242. The cubic root of 200521669 is about 585.3115626753.

The spelling of 200521669 in words is "two hundred million, five hundred twenty-one thousand, six hundred sixty-nine".