199968929 has 2 divisors, whose sum is σ = 199968930. Its totient is φ = 199968928.

The previous prime is 199968917. The next prime is 199968953. The reversal of 199968929 is 929869991.

199968929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181710400 + 18258529 = 13480^2 + 4273^2 .

It is an emirp because it is prime and its reverse (929869991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199968929 - 2¹² = 199964833 is a prime.

It is not a weakly prime, because it can be changed into another prime (199961929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99984464 + 99984465.

It is an arithmetic number, because the mean of its divisors is an integer number (99984465).

Almost surely, 2^199968929 is an apocalyptic number.

It is an amenable number.

199968929 is a deficient number, since it is larger than the sum of its proper divisors (1).

199968929 is an equidigital number, since it uses as much as digits as its factorization.

199968929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5668704, while the sum is 62.

The square root of 199968929 is about 14141.0370553224. The cubic root of 199968929 is about 584.7732620225.

The spelling of 199968929 in words is "one hundred ninety-nine million, nine hundred sixty-eight thousand, nine hundred twenty-nine".