199216937 has 2 divisors, whose sum is σ = 199216938. Its totient is φ = 199216936.

The previous prime is 199216933. The next prime is 199216949. The reversal of 199216937 is 739612991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169416256 + 29800681 = 13016^2 + 5459^2 .

It is a cyclic number.

It is not a de Polignac number, because 199216937 - 2² = 199216933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199216891 and 199216900.

It is not a weakly prime, because it can be changed into another prime (199216933) 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, 99608468 + 99608469.

It is an arithmetic number, because the mean of its divisors is an integer number (99608469).

Almost surely, 2^199216937 is an apocalyptic number.

It is an amenable number.

199216937 is a deficient number, since it is larger than the sum of its proper divisors (1).

199216937 is an equidigital number, since it uses as much as digits as its factorization.

199216937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 47.

The square root of 199216937 is about 14114.4230133576. The cubic root of 199216937 is about 584.0393193408.

The spelling of 199216937 in words is "one hundred ninety-nine million, two hundred sixteen thousand, nine hundred thirty-seven".