200521397 has 2 divisors, whose sum is σ = 200521398. Its totient is φ = 200521396.

The previous prime is 200521379. The next prime is 200521417. The reversal of 200521397 is 793125002.

Together with previous prime (200521379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142898116 + 57623281 = 11954^2 + 7591^2 .

It is a cyclic number.

It is not a de Polignac number, because 200521397 - 2⁸ = 200521141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200521357) 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, 100260698 + 100260699.

It is an arithmetic number, because the mean of its divisors is an integer number (100260699).

Almost surely, 2^200521397 is an apocalyptic number.

It is an amenable number.

200521397 is a deficient number, since it is larger than the sum of its proper divisors (1).

200521397 is an equidigital number, since it uses as much as digits as its factorization.

200521397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 200521397 is about 14160.5577926860. The cubic root of 200521397 is about 585.3112980242.

Adding to 200521397 its reverse (793125002), we get a palindrome (993646399).

The spelling of 200521397 in words is "two hundred million, five hundred twenty-one thousand, three hundred ninety-seven".