112890191 has 4 divisors (see below), whose sum is σ = 118831800. Its totient is φ = 106948584.

The previous prime is 112890157. The next prime is 112890203. The reversal of 112890191 is 191098211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 112890191 - 2¹⁰ = 112889167 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 (112890091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2970776 + ... + 2970813.

It is an arithmetic number, because the mean of its divisors is an integer number (29707950).

Almost surely, 2^112890191 is an apocalyptic number.

112890191 is a deficient number, since it is larger than the sum of its proper divisors (5941609).

112890191 is an equidigital number, since it uses as much as digits as its factorization.

112890191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5941608.

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 112890191 is about 10624.9795764510. The cubic root of 112890191 is about 483.3021598074.

It can be divided in two parts, 1128 and 90191, that added together give a palindrome (91319).

The spelling of 112890191 in words is "one hundred twelve million, eight hundred ninety thousand, one hundred ninety-one".