200504981 has 2 divisors, whose sum is σ = 200504982. Its totient is φ = 200504980.

The previous prime is 200504977. The next prime is 200504999. The reversal of 200504981 is 189405002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154604356 + 45900625 = 12434^2 + 6775^2 .

It is a cyclic number.

It is not a de Polignac number, because 200504981 - 2² = 200504977 is a prime.

It is a super-2 number, since 2×200504981² = 80404494811620722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200504911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100252490 + 100252491.

It is an arithmetic number, because the mean of its divisors is an integer number (100252491).

Almost surely, 2^200504981 is an apocalyptic number.

It is an amenable number.

200504981 is a deficient number, since it is larger than the sum of its proper divisors (1).

200504981 is an equidigital number, since it uses as much as digits as its factorization.

200504981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 200504981 is about 14159.9781426385. The cubic root of 200504981 is about 585.2953251112.

Adding to 200504981 its reverse (189405002), we get a palindrome (389909983).

The spelling of 200504981 in words is "two hundred million, five hundred four thousand, nine hundred eighty-one".