123441813 has 24 divisors (see below), whose sum is σ = 201722976. Its totient is φ = 74811600.

The previous prime is 123441781. The next prime is 123441817. The reversal of 123441813 is 318144321.

123441813 is a `hidden beast` number, since 1 + 234 + 418 + 13 = 666.

It is not a de Polignac number, because 123441813 - 2⁵ = 123441781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123441817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20418 + ... + 25763.

It is an arithmetic number, because the mean of its divisors is an integer number (8405124).

Almost surely, 2^123441813 is an apocalyptic number.

It is an amenable number.

123441813 is a deficient number, since it is larger than the sum of its proper divisors (78281163).

123441813 is an equidigital number, since it uses as much as digits as its factorization.

123441813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46207 (or 46195 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 123441813 is about 11110.4371201137. The cubic root of 123441813 is about 497.9137243486.

The spelling of 123441813 in words is "one hundred twenty-three million, four hundred forty-one thousand, eight hundred thirteen".