123163559 has 4 divisors (see below), whose sum is σ = 124253616. Its totient is φ = 122073504.

The previous prime is 123163553. The next prime is 123163571. The reversal of 123163559 is 955361321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955361321 = 61 ⋅15661661.

It is a cyclic number.

It is not a de Polignac number, because 123163559 - 2¹⁶ = 123098023 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 (123163553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544859 + ... + 545084.

It is an arithmetic number, because the mean of its divisors is an integer number (31063404).

Almost surely, 2^123163559 is an apocalyptic number.

123163559 is a deficient number, since it is larger than the sum of its proper divisors (1090057).

123163559 is a wasteful number, since it uses less digits than its factorization.

123163559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090056.

The product of its digits is 24300, while the sum is 35.

The square root of 123163559 is about 11097.9078658998. The cubic root of 123163559 is about 497.5393219932.

The spelling of 123163559 in words is "one hundred twenty-three million, one hundred sixty-three thousand, five hundred fifty-nine".