199930939 has 8 divisors (see below), whose sum is σ = 226642640. Its totient is φ = 174838176.

The previous prime is 199930937. The next prime is 199930967. The reversal of 199930939 is 939039991.

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 199930939 - 2¹ = 199930937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199930937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404472 + ... + 404965.

It is an arithmetic number, because the mean of its divisors is an integer number (28330330).

Almost surely, 2^199930939 is an apocalyptic number.

199930939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

199930939 is a deficient number, since it is larger than the sum of its proper divisors (26711701).

199930939 is a wasteful number, since it uses less digits than its factorization.

199930939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809469.

The product of its (nonzero) digits is 531441, while the sum is 52.

The square root of 199930939 is about 14139.6937378431. The cubic root of 199930939 is about 584.7362280304.

The spelling of 199930939 in words is "one hundred ninety-nine million, nine hundred thirty thousand, nine hundred thirty-nine".