123431423 has 4 divisors (see below), whose sum is σ = 123901008. Its totient is φ = 122961840.

The previous prime is 123431401. The next prime is 123431431. The reversal of 123431423 is 324134321.

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 123431423 - 2⁸ = 123431167 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 (123431123) 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, 234398 + ... + 234923.

It is an arithmetic number, because the mean of its divisors is an integer number (30975252).

Almost surely, 2^123431423 is an apocalyptic number.

123431423 is a deficient number, since it is larger than the sum of its proper divisors (469585).

123431423 is an equidigital number, since it uses as much as digits as its factorization.

123431423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469584.

The product of its digits is 1728, while the sum is 23.

The square root of 123431423 is about 11109.9695319114. The cubic root of 123431423 is about 497.8997542882.

Adding to 123431423 its reverse (324134321), we get a palindrome (447565744).

The spelling of 123431423 in words is "one hundred twenty-three million, four hundred thirty-one thousand, four hundred twenty-three".