200861081 has 2 divisors, whose sum is σ = 200861082. Its totient is φ = 200861080.

The previous prime is 200861077. The next prime is 200861107. The reversal of 200861081 is 180168002.

It is an a-pointer prime, because the next prime (200861107) can be obtained adding 200861081 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109830400 + 91030681 = 10480^2 + 9541^2 .

It is a cyclic number.

It is not a de Polignac number, because 200861081 - 2² = 200861077 is a prime.

It is a super-2 number, since 2×200861081² = 80690347720977122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200861081.

It is not a weakly prime, because it can be changed into another prime (200861051) 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, 100430540 + 100430541.

It is an arithmetic number, because the mean of its divisors is an integer number (100430541).

Almost surely, 2^200861081 is an apocalyptic number.

It is an amenable number.

200861081 is a deficient number, since it is larger than the sum of its proper divisors (1).

200861081 is an equidigital number, since it uses as much as digits as its factorization.

200861081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 200861081 is about 14172.5467365608. The cubic root of 200861081 is about 585.6416180860.

The spelling of 200861081 in words is "two hundred million, eight hundred sixty-one thousand, eighty-one".