123216423 has 8 divisors (see below), whose sum is σ = 179223936. Its totient is φ = 74676600.

The previous prime is 123216421. The next prime is 123216487. The reversal of 123216423 is 324612321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123216423 - 2¹ = 123216421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123216393 and 123216402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123216421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1866883 + ... + 1866948.

It is an arithmetic number, because the mean of its divisors is an integer number (22402992).

Almost surely, 2^123216423 is an apocalyptic number.

123216423 is a deficient number, since it is larger than the sum of its proper divisors (56007513).

123216423 is a wasteful number, since it uses less digits than its factorization.

123216423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733845.

The product of its digits is 1728, while the sum is 24.

The square root of 123216423 is about 11100.2893205538. The cubic root of 123216423 is about 497.6104960665.

Adding to 123216423 its reverse (324612321), we get a palindrome (447828744).

The spelling of 123216423 in words is "one hundred twenty-three million, two hundred sixteen thousand, four hundred twenty-three".