199930291 has 16 divisors (see below), whose sum is σ = 223171200. Its totient is φ = 177572800.

The previous prime is 199930259. The next prime is 199930301. The reversal of 199930291 is 192039991.

It is a cyclic number.

It is not a de Polignac number, because 199930291 - 2⁵ = 199930259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199930231) 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 15 ways as a sum of consecutive naturals, for example, 115311 + ... + 117031.

It is an arithmetic number, because the mean of its divisors is an integer number (13948200).

Almost surely, 2^199930291 is an apocalyptic number.

199930291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

199930291 is a deficient number, since it is larger than the sum of its proper divisors (23240909).

199930291 is a wasteful number, since it uses less digits than its factorization.

199930291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970.

The product of its (nonzero) digits is 39366, while the sum is 43.

The square root of 199930291 is about 14139.6708236083. The cubic root of 199930291 is about 584.7355962964.

The spelling of 199930291 in words is "one hundred ninety-nine million, nine hundred thirty thousand, two hundred ninety-one".