199680850 has 12 divisors (see below), whose sum is σ = 371406474. Its totient is φ = 79872320.

The previous prime is 199680809. The next prime is 199680851. The reversal of 199680850 is 58086991.

It can be written as a sum of positive squares in 3 ways, for example, as 100220121 + 99460729 = 10011^2 + 9973^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 199680850.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199680851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1996759 + ... + 1996858.

Almost surely, 2^199680850 is an apocalyptic number.

199680850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199680850 is a deficient number, since it is larger than the sum of its proper divisors (171725624).

199680850 is a wasteful number, since it uses less digits than its factorization.

199680850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993629 (or 3993624 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 199680850 is about 14130.8474622013. The cubic root of 199680850 is about 584.4923152804.

It can be divided in two parts, 19 and 9680850, that added together give a palindrome (9680869).

The spelling of 199680850 in words is "one hundred ninety-nine million, six hundred eighty thousand, eight hundred fifty".