523430123 has 4 divisors (see below), whose sum is σ = 532301880. Its totient is φ = 514558368.

The previous prime is 523430057. The next prime is 523430137. The reversal of 523430123 is 321034325.

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 523430123 - 2⁸ = 523429867 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523430923) 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, 4435790 + ... + 4435907.

It is an arithmetic number, because the mean of its divisors is an integer number (133075470).

Almost surely, 2^523430123 is an apocalyptic number.

523430123 is a deficient number, since it is larger than the sum of its proper divisors (8871757).

523430123 is an equidigital number, since it uses as much as digits as its factorization.

523430123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8871756.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 523430123 is about 22878.5953021596. The cubic root of 523430123 is about 805.9094298787.

Adding to 523430123 its reverse (321034325), we get a palindrome (844464448).

The spelling of 523430123 in words is "five hundred twenty-three million, four hundred thirty thousand, one hundred twenty-three".