123423311 has 4 divisors (see below), whose sum is σ = 134643624. Its totient is φ = 112203000.

The previous prime is 123423283. The next prime is 123423319. The reversal of 123423311 is 113324321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113324321 = 11 ⋅10302211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123423311 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 (123423319) 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, 5610140 + ... + 5610161.

It is an arithmetic number, because the mean of its divisors is an integer number (33660906).

Almost surely, 2^123423311 is an apocalyptic number.

123423311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123423311 is a deficient number, since it is larger than the sum of its proper divisors (11220313).

123423311 is a wasteful number, since it uses less digits than its factorization.

123423311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11220312.

The product of its digits is 432, while the sum is 20.

The square root of 123423311 is about 11109.6044484041. The cubic root of 123423311 is about 497.8888466085. Note that the first 4 decimals are identical.

Adding to 123423311 its reverse (113324321), we get a palindrome (236747632).

The spelling of 123423311 in words is "one hundred twenty-three million, four hundred twenty-three thousand, three hundred eleven".