199968931 has 8 divisors (see below), whose sum is σ = 205884000. Its totient is φ = 194103360.

The previous prime is 199968929. The next prime is 199968953. The reversal of 199968931 is 139869991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199968931 - 2¹ = 199968929 is a prime.

It is a super-2 number, since 2×199968931² = 79975146730565522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199968911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4096 + ... + 20413.

It is an arithmetic number, because the mean of its divisors is an integer number (25735500).

Almost surely, 2^199968931 is an apocalyptic number.

199968931 is a deficient number, since it is larger than the sum of its proper divisors (5915069).

199968931 is a wasteful number, since it uses less digits than its factorization.

199968931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24749.

The product of its digits is 944784, while the sum is 55.

The square root of 199968931 is about 14141.0371260385. The cubic root of 199968931 is about 584.7732639720.

The spelling of 199968931 in words is "one hundred ninety-nine million, nine hundred sixty-eight thousand, nine hundred thirty-one".