123427823 has 4 divisors (see below), whose sum is σ = 125519880. Its totient is φ = 121335768.

The previous prime is 123427751. The next prime is 123427847. The reversal of 123427823 is 328724321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 328724321 = 5651 ⋅58171.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123427823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123427823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123427883) 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, 1045940 + ... + 1046057.

It is an arithmetic number, because the mean of its divisors is an integer number (31379970).

Almost surely, 2^123427823 is an apocalyptic number.

123427823 is a deficient number, since it is larger than the sum of its proper divisors (2092057).

123427823 is an equidigital number, since it uses as much as digits as its factorization.

123427823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092056.

The product of its digits is 16128, while the sum is 32.

The square root of 123427823 is about 11109.8075140841. The cubic root of 123427823 is about 497.8949136610.

The spelling of 123427823 in words is "one hundred twenty-three million, four hundred twenty-seven thousand, eight hundred twenty-three".