123116559 has 4 divisors (see below), whose sum is σ = 164155416. Its totient is φ = 82077704.

The previous prime is 123116519. The next prime is 123116569. The reversal of 123116559 is 955611321.

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 123116559 - 2¹⁷ = 122985487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123116519) 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, 20519424 + ... + 20519429.

It is an arithmetic number, because the mean of its divisors is an integer number (41038854).

Almost surely, 2^123116559 is an apocalyptic number.

123116559 is a deficient number, since it is larger than the sum of its proper divisors (41038857).

123116559 is an equidigital number, since it uses as much as digits as its factorization.

123116559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41038856.

The product of its digits is 8100, while the sum is 33.

The square root of 123116559 is about 11095.7901476191. The cubic root of 123116559 is about 497.4760258811.

The spelling of 123116559 in words is "one hundred twenty-three million, one hundred sixteen thousand, five hundred fifty-nine".