200029981 has 2 divisors, whose sum is σ = 200029982. Its totient is φ = 200029980.

The previous prime is 200029969. The next prime is 200029987. The reversal of 200029981 is 189920002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190164100 + 9865881 = 13790^2 + 3141^2 .

It is a cyclic number.

It is not a de Polignac number, because 200029981 - 2²¹ = 197932829 is a prime.

It is a super-2 number, since 2×200029981² = 80023986597720722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200029987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100014990 + 100014991.

It is an arithmetic number, because the mean of its divisors is an integer number (100014991).

Almost surely, 2^200029981 is an apocalyptic number.

It is an amenable number.

200029981 is a deficient number, since it is larger than the sum of its proper divisors (1).

200029981 is an equidigital number, since it uses as much as digits as its factorization.

200029981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 200029981 is about 14143.1955724299. The cubic root of 200029981 is about 584.8327678411.

Adding to 200029981 its reverse (189920002), we get a palindrome (389949983).

The spelling of 200029981 in words is "two hundred million, twenty-nine thousand, nine hundred eighty-one".