199950761 has 2 divisors, whose sum is σ = 199950762. Its totient is φ = 199950760.

The previous prime is 199950757. The next prime is 199950763. The reversal of 199950761 is 167059991.

199950761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165611161 + 34339600 = 12869^2 + 5860^2 .

It is a cyclic number.

It is not a de Polignac number, because 199950761 - 2² = 199950757 is a prime.

Together with 199950763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199950763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99975380 + 99975381.

It is an arithmetic number, because the mean of its divisors is an integer number (99975381).

Almost surely, 2^199950761 is an apocalyptic number.

It is an amenable number.

199950761 is a deficient number, since it is larger than the sum of its proper divisors (1).

199950761 is an equidigital number, since it uses as much as digits as its factorization.

199950761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 47.

The square root of 199950761 is about 14140.3946550300. The cubic root of 199950761 is about 584.7555518004.

The spelling of 199950761 in words is "one hundred ninety-nine million, nine hundred fifty thousand, seven hundred sixty-one".