199680851 has 2 divisors, whose sum is σ = 199680852. Its totient is φ = 199680850.

The previous prime is 199680809. The next prime is 199680857. The reversal of 199680851 is 158086991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199680851 - 2⁶ = 199680787 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 199680796 and 199680805.

It is not a weakly prime, because it can be changed into another prime (199680857) 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, 99840425 + 99840426.

It is an arithmetic number, because the mean of its divisors is an integer number (99840426).

Almost surely, 2^199680851 is an apocalyptic number.

199680851 is a deficient number, since it is larger than the sum of its proper divisors (1).

199680851 is an equidigital number, since it uses as much as digits as its factorization.

199680851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 199680851 is about 14130.8474975848. The cubic root of 199680851 is about 584.4923162561.

The spelling of 199680851 in words is "one hundred ninety-nine million, six hundred eighty thousand, eight hundred fifty-one".