123634423 has 4 divisors (see below), whose sum is σ = 134873928. Its totient is φ = 112394920.

The previous prime is 123634409. The next prime is 123634429. The reversal of 123634423 is 324436321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 123634423 - 2⁵ = 123634391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123634391 and 123634400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123634429) 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, 5619736 + ... + 5619757.

It is an arithmetic number, because the mean of its divisors is an integer number (33718482).

Almost surely, 2^123634423 is an apocalyptic number.

123634423 is a deficient number, since it is larger than the sum of its proper divisors (11239505).

123634423 is a wasteful number, since it uses less digits than its factorization.

123634423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11239504.

The product of its digits is 10368, while the sum is 28.

The square root of 123634423 is about 11119.1017173151. The cubic root of 123634423 is about 498.1725597278.

The spelling of 123634423 in words is "one hundred twenty-three million, six hundred thirty-four thousand, four hundred twenty-three".