123388163 has 4 divisors (see below), whose sum is σ = 123456120. Its totient is φ = 123320208.

The previous prime is 123388157. The next prime is 123388183. The reversal of 123388163 is 361883321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 361883321 = 281 ⋅1287841.

It is a cyclic number.

It is not a de Polignac number, because 123388163 - 2⁶ = 123388099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123388183) 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, 31178 + ... + 34911.

It is an arithmetic number, because the mean of its divisors is an integer number (30864030).

Almost surely, 2^123388163 is an apocalyptic number.

123388163 is a deficient number, since it is larger than the sum of its proper divisors (67957).

123388163 is an equidigital number, since it uses as much as digits as its factorization.

123388163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67956.

The product of its digits is 20736, while the sum is 35.

The square root of 123388163 is about 11108.0224612665. The cubic root of 123388163 is about 497.8415798524.

The spelling of 123388163 in words is "one hundred twenty-three million, three hundred eighty-eight thousand, one hundred sixty-three".