199647853 has 2 divisors, whose sum is σ = 199647854. Its totient is φ = 199647852.

The previous prime is 199647841. The next prime is 199647857. The reversal of 199647853 is 358746991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196504324 + 3143529 = 14018^2 + 1773^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199647853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199647853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199647857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99823926 + 99823927.

It is an arithmetic number, because the mean of its divisors is an integer number (99823927).

Almost surely, 2^199647853 is an apocalyptic number.

It is an amenable number.

199647853 is a deficient number, since it is larger than the sum of its proper divisors (1).

199647853 is an equidigital number, since it uses as much as digits as its factorization.

199647853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 199647853 is about 14129.6798619077. The cubic root of 199647853 is about 584.4601179759.

The spelling of 199647853 in words is "one hundred ninety-nine million, six hundred forty-seven thousand, eight hundred fifty-three".