191397116 has 12 divisors (see below), whose sum is σ = 335145888. Its totient is φ = 95641152.

The previous prime is 191397103. The next prime is 191397137. The reversal of 191397116 is 611793191.

It is a self number, because there is not a number n which added to its sum of digits gives 191397116.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6356 + ... + 20571.

It is an arithmetic number, because the mean of its divisors is an integer number (27928824).

Almost surely, 2^191397116 is an apocalyptic number.

It is an amenable number.

191397116 is a deficient number, since it is larger than the sum of its proper divisors (143748772).

191397116 is a wasteful number, since it uses less digits than its factorization.

191397116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28708 (or 28706 counting only the distinct ones).

The product of its digits is 10206, while the sum is 38.

The square root of 191397116 is about 13834.6346536510. The cubic root of 191397116 is about 576.2953691832.

The spelling of 191397116 in words is "one hundred ninety-one million, three hundred ninety-seven thousand, one hundred sixteen".