199968471 has 6 divisors (see below), whose sum is σ = 288843360. Its totient is φ = 133312308.

The previous prime is 199968469. The next prime is 199968479. The reversal of 199968471 is 174869991.

It is not a de Polignac number, because 199968471 - 2¹ = 199968469 is a prime.

It is a super-3 number, since 3×199968471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199968479) 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, 11109351 + ... + 11109368.

It is an arithmetic number, because the mean of its divisors is an integer number (48140560).

Almost surely, 2^199968471 is an apocalyptic number.

199968471 is a deficient number, since it is larger than the sum of its proper divisors (88874889).

199968471 is a wasteful number, since it uses less digits than its factorization.

199968471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22218725 (or 22218722 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 199968471 is about 14141.0208613098. The cubic root of 199968471 is about 584.7728155758.

The spelling of 199968471 in words is "one hundred ninety-nine million, nine hundred sixty-eight thousand, four hundred seventy-one".