123344431 has 4 divisors (see below), whose sum is σ = 140965072. Its totient is φ = 105723792.

The previous prime is 123344407. The next prime is 123344449. The reversal of 123344431 is 134443321.

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

It is a cyclic number.

It is not a de Polignac number, because 123344431 - 2⁵ = 123344399 is a prime.

It is a super-2 number, since 2×123344431² = 30427697317427522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123344396 and 123344405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123344461) 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, 8810310 + ... + 8810323.

It is an arithmetic number, because the mean of its divisors is an integer number (35241268).

Almost surely, 2^123344431 is an apocalyptic number.

123344431 is a deficient number, since it is larger than the sum of its proper divisors (17620641).

123344431 is an equidigital number, since it uses as much as digits as its factorization.

123344431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17620640.

The product of its digits is 3456, while the sum is 25.

The square root of 123344431 is about 11106.0537996176. The cubic root of 123344431 is about 497.7827568662.

Adding to 123344431 its reverse (134443321), we get a palindrome (257787752).

The spelling of 123344431 in words is "one hundred twenty-three million, three hundred forty-four thousand, four hundred thirty-one".