112123409 has 2 divisors, whose sum is σ = 112123410. Its totient is φ = 112123408.

The previous prime is 112123393. The next prime is 112123411. The reversal of 112123409 is 904321211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91393600 + 20729809 = 9560^2 + 4553^2 .

It is a cyclic number.

It is not a de Polignac number, because 112123409 - 2⁴ = 112123393 is a prime.

Together with 112123411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (112123439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56061704 + 56061705.

It is an arithmetic number, because the mean of its divisors is an integer number (56061705).

Almost surely, 2^112123409 is an apocalyptic number.

It is an amenable number.

112123409 is a deficient number, since it is larger than the sum of its proper divisors (1).

112123409 is an equidigital number, since it uses as much as digits as its factorization.

112123409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 112123409 is about 10588.8341662338. The cubic root of 112123409 is about 482.2054314479.

The spelling of 112123409 in words is "one hundred twelve million, one hundred twenty-three thousand, four hundred nine".