199787963 has 8 divisors (see below), whose sum is σ = 206395776. Its totient is φ = 193190400.

The previous prime is 199787941. The next prime is 199787971. The reversal of 199787963 is 369787991.

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 199787963 - 2¹² = 199783867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199787663) 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, 71195 + ... + 73947.

It is an arithmetic number, because the mean of its divisors is an integer number (25799472).

Almost surely, 2^199787963 is an apocalyptic number.

199787963 is a deficient number, since it is larger than the sum of its proper divisors (6607813).

199787963 is a wasteful number, since it uses less digits than its factorization.

199787963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125.

The product of its digits is 5143824, while the sum is 59.

The square root of 199787963 is about 14134.6369956925. The cubic root of 199787963 is about 584.5968079148.

The spelling of 199787963 in words is "one hundred ninety-nine million, seven hundred eighty-seven thousand, nine hundred sixty-three".