199445759 has 2 divisors, whose sum is σ = 199445760. Its totient is φ = 199445758.

The previous prime is 199445749. The next prime is 199445761. The reversal of 199445759 is 957544991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199445759 is a prime.

It is a super-2 number, since 2×199445759² = 79557221566172162, which contains 22 as substring.

Together with 199445761, it forms a pair of twin primes.

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 199445759.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199445749) 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, 99722879 + 99722880.

It is an arithmetic number, because the mean of its divisors is an integer number (99722880).

Almost surely, 2^199445759 is an apocalyptic number.

199445759 is a deficient number, since it is larger than the sum of its proper divisors (1).

199445759 is an equidigital number, since it uses as much as digits as its factorization.

199445759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 53.

The square root of 199445759 is about 14122.5266507095. The cubic root of 199445759 is about 584.2628443629.

The spelling of 199445759 in words is "one hundred ninety-nine million, four hundred forty-five thousand, seven hundred fifty-nine".