199682261 has 2 divisors, whose sum is σ = 199682262. Its totient is φ = 199682260.

The previous prime is 199682243. The next prime is 199682279. The reversal of 199682261 is 162286991.

It is a balanced prime because it is at equal distance from previous prime (199682243) and next prime (199682279).

It can be written as a sum of positive squares in only one way, i.e., 124322500 + 75359761 = 11150^2 + 8681^2 .

It is an emirp because it is prime and its reverse (162286991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199682261 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (199682291) 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, 99841130 + 99841131.

It is an arithmetic number, because the mean of its divisors is an integer number (99841131).

Almost surely, 2^199682261 is an apocalyptic number.

It is an amenable number.

199682261 is a deficient number, since it is larger than the sum of its proper divisors (1).

199682261 is an equidigital number, since it uses as much as digits as its factorization.

199682261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 44.

The square root of 199682261 is about 14130.8973883473. The cubic root of 199682261 is about 584.4936920052.

The spelling of 199682261 in words is "one hundred ninety-nine million, six hundred eighty-two thousand, two hundred sixty-one".