199243378 has 8 divisors (see below), whose sum is σ = 299320560. Its totient is φ = 99469860.

The previous prime is 199243351. The next prime is 199243379. The reversal of 199243378 is 873342991.

199243378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (199243379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74268 + ... + 76903.

It is an arithmetic number, because the mean of its divisors is an integer number (37415070).

Almost surely, 2^199243378 is an apocalyptic number.

199243378 is a deficient number, since it is larger than the sum of its proper divisors (100077182).

199243378 is a wasteful number, since it uses less digits than its factorization.

199243378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151832.

The product of its digits is 326592, while the sum is 46.

The square root of 199243378 is about 14115.3596482697. The cubic root of 199243378 is about 584.0651570042.

The spelling of 199243378 in words is "one hundred ninety-nine million, two hundred forty-three thousand, three hundred seventy-eight".