123423881 has 4 divisors (see below), whose sum is σ = 141055872. Its totient is φ = 105791892.

The previous prime is 123423871. The next prime is 123423887. The reversal of 123423881 is 188324321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123423881 - 2¹⁸ = 123161737 is a prime.

It is a super-2 number, since 2×123423881² = 30466908802204322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123423887) 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, 8815985 + ... + 8815998.

It is an arithmetic number, because the mean of its divisors is an integer number (35263968).

Almost surely, 2^123423881 is an apocalyptic number.

It is an amenable number.

123423881 is a deficient number, since it is larger than the sum of its proper divisors (17631991).

123423881 is an equidigital number, since it uses as much as digits as its factorization.

123423881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17631990.

The product of its digits is 9216, while the sum is 32.

The square root of 123423881 is about 11109.6301018531. The cubic root of 123423881 is about 497.8896130661.

The spelling of 123423881 in words is "one hundred twenty-three million, four hundred twenty-three thousand, eight hundred eighty-one".