123310403 has 4 divisors (see below), whose sum is σ = 123381120. Its totient is φ = 123239688.

The previous prime is 123310339. The next prime is 123310417. The reversal of 123310403 is 304013321.

It is a happy number.

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 123310403 - 2⁶ = 123310339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123310483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32675 + ... + 36252.

It is an arithmetic number, because the mean of its divisors is an integer number (30845280).

Almost surely, 2^123310403 is an apocalyptic number.

123310403 is a deficient number, since it is larger than the sum of its proper divisors (70717).

123310403 is an equidigital number, since it uses as much as digits as its factorization.

123310403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70716.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 123310403 is about 11104.5217366621. The cubic root of 123310403 is about 497.7369769057.

Adding to 123310403 its reverse (304013321), we get a palindrome (427323724).

The spelling of 123310403 in words is "one hundred twenty-three million, three hundred ten thousand, four hundred three".