200830781 has 2 divisors, whose sum is σ = 200830782. Its totient is φ = 200830780.

The previous prime is 200830757. The next prime is 200830801. The reversal of 200830781 is 187038002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101828281 + 99002500 = 10091^2 + 9950^2 .

It is a cyclic number.

It is not a de Polignac number, because 200830781 - 2¹⁰ = 200829757 is a prime.

It is a super-2 number, since 2×200830781² = 80666005194139922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200830381) 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, 100415390 + 100415391.

It is an arithmetic number, because the mean of its divisors is an integer number (100415391).

Almost surely, 2^200830781 is an apocalyptic number.

It is an amenable number.

200830781 is a deficient number, since it is larger than the sum of its proper divisors (1).

200830781 is an equidigital number, since it uses as much as digits as its factorization.

200830781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 200830781 is about 14171.4777281694. The cubic root of 200830781 is about 585.6121684894.

Adding to 200830781 its reverse (187038002), we get a palindrome (387868783).

The spelling of 200830781 in words is "two hundred million, eight hundred thirty thousand, seven hundred eighty-one".