191299994 has 8 divisors (see below), whose sum is σ = 287119488. Its totient is φ = 95593500.

The previous prime is 191299987. The next prime is 191300033. The reversal of 191299994 is 499992191.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23882 + ... + 30869.

It is an arithmetic number, because the mean of its divisors is an integer number (35889936).

Almost surely, 2^191299994 is an apocalyptic number.

191299994 is a deficient number, since it is larger than the sum of its proper divisors (95819494).

191299994 is a wasteful number, since it uses less digits than its factorization.

191299994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56500.

The product of its digits is 472392, while the sum is 53.

The square root of 191299994 is about 13831.1241047140. The cubic root of 191299994 is about 576.1978748045.

The spelling of 191299994 in words is "one hundred ninety-one million, two hundred ninety-nine thousand, nine hundred ninety-four".