112178991 has 8 divisors (see below), whose sum is σ = 149624320. Its totient is φ = 74759832.

The previous prime is 112178953. The next prime is 112178999. The reversal of 112178991 is 199871211.

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

It is a de Polignac number, because none of the positive numbers 2^k-112178991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112178999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8226 + ... + 17088.

It is an arithmetic number, because the mean of its divisors is an integer number (18703040).

Almost surely, 2^112178991 is an apocalyptic number.

112178991 is a deficient number, since it is larger than the sum of its proper divisors (37445329).

112178991 is an equidigital number, since it uses as much as digits as its factorization.

112178991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13085.

The product of its digits is 9072, while the sum is 39.

The square root of 112178991 is about 10591.4583981622. The cubic root of 112178991 is about 482.2850981740.

The spelling of 112178991 in words is "one hundred twelve million, one hundred seventy-eight thousand, nine hundred ninety-one".