191063812 has 12 divisors (see below), whose sum is σ = 335046096. Its totient is φ = 95336360.

The previous prime is 191063779. The next prime is 191063827. The reversal of 191063812 is 218360191.

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, 46678 + ... + 50605.

It is an arithmetic number, because the mean of its divisors is an integer number (27920508).

Almost surely, 2^191063812 is an apocalyptic number.

It is an amenable number.

191063812 is a deficient number, since it is larger than the sum of its proper divisors (143982284).

191063812 is a wasteful number, since it uses less digits than its factorization.

191063812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97778 (or 97776 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 191063812 is about 13822.5834054275. The cubic root of 191063812 is about 575.9606494787.

The spelling of 191063812 in words is "one hundred ninety-one million, sixty-three thousand, eight hundred twelve".