123358813 has 4 divisors (see below), whose sum is σ = 123394140. Its totient is φ = 123323488.

The previous prime is 123358801. The next prime is 123358819. The reversal of 123358813 is 318853321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318853321 = 31 ⋅10285591.

It can be written as a sum of positive squares in 2 ways, for example, as 33431524 + 89927289 = 5782^2 + 9483^2 .

It is a cyclic number.

It is not a de Polignac number, because 123358813 - 2²¹ = 121261661 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 (123358819) 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, 11770 + ... + 19627.

It is an arithmetic number, because the mean of its divisors is an integer number (30848535).

Almost surely, 2^123358813 is an apocalyptic number.

It is an amenable number.

123358813 is a deficient number, since it is larger than the sum of its proper divisors (35327).

123358813 is an equidigital number, since it uses as much as digits as its factorization.

123358813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35326.

The product of its digits is 17280, while the sum is 34.

The square root of 123358813 is about 11106.7012654523. The cubic root of 123358813 is about 497.8021033237.

The spelling of 123358813 in words is "one hundred twenty-three million, three hundred fifty-eight thousand, eight hundred thirteen".