199969378 has 16 divisors (see below), whose sum is σ = 344911680. Its totient is φ = 85174416.

The previous prime is 199969373. The next prime is 199969409. The reversal of 199969378 is 873969991.

It is not an unprimeable number, because it can be changed into a prime (199969373) 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, 41533 + ... + 46096.

It is an arithmetic number, because the mean of its divisors is an integer number (21556980).

Almost surely, 2^199969378 is an apocalyptic number.

199969378 is a deficient number, since it is larger than the sum of its proper divisors (144942302).

199969378 is a wasteful number, since it uses less digits than its factorization.

199969378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87801.

The product of its digits is 6613488, while the sum is 61.

The square root of 199969378 is about 14141.0529310939. The cubic root of 199969378 is about 584.7736996955.

The spelling of 199969378 in words is "one hundred ninety-nine million, nine hundred sixty-nine thousand, three hundred seventy-eight".