112123691 has 4 divisors (see below), whose sum is σ = 112866384. Its totient is φ = 111381000.

The previous prime is 112123679. The next prime is 112123709. The reversal of 112123691 is 196321211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112123691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 112123691.

It is not an unprimeable number, because it can be changed into a prime (112123391) 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, 371120 + ... + 371421.

It is an arithmetic number, because the mean of its divisors is an integer number (28216596).

Almost surely, 2^112123691 is an apocalyptic number.

112123691 is a deficient number, since it is larger than the sum of its proper divisors (742693).

112123691 is an equidigital number, since it uses as much as digits as its factorization.

112123691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742692.

The product of its digits is 648, while the sum is 26.

The square root of 112123691 is about 10588.8474821389. The cubic root of 112123691 is about 482.2058357103.

The spelling of 112123691 in words is "one hundred twelve million, one hundred twenty-three thousand, six hundred ninety-one".