199775643 has 8 divisors (see below), whose sum is σ = 267309888. Its totient is φ = 132712584.

The previous prime is 199775591. The next prime is 199775647. The reversal of 199775643 is 346577991.

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

It is not a de Polignac number, because 199775643 - 2⁶ = 199775579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199775647) 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, 116805 + ... + 118502.

It is an arithmetic number, because the mean of its divisors is an integer number (33413736).

Almost surely, 2^199775643 is an apocalyptic number.

199775643 is a deficient number, since it is larger than the sum of its proper divisors (67534245).

199775643 is a wasteful number, since it uses less digits than its factorization.

199775643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235593.

The product of its digits is 1428840, while the sum is 51.

The square root of 199775643 is about 14134.2011801163. The cubic root of 199775643 is about 584.5847912070.

The spelling of 199775643 in words is "one hundred ninety-nine million, seven hundred seventy-five thousand, six hundred forty-three".