123311403 has 10 divisors (see below), whose sum is σ = 184206044. Its totient is φ = 82207548.

The previous prime is 123311399. The next prime is 123311413. The reversal of 123311403 is 304113321.

It is not a de Polignac number, because 123311403 - 2² = 123311399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123311413) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 761101 + ... + 761262.

Almost surely, 2^123311403 is an apocalyptic number.

123311403 is a deficient number, since it is larger than the sum of its proper divisors (60894641).

123311403 is an equidigital number, since it uses as much as digits as its factorization.

123311403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522375 (or 1522366 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 123311403 is about 11104.5667632736. The cubic root of 123311403 is about 497.7383223873.

Adding to 123311403 its reverse (304113321), we get a palindrome (427424724).

The spelling of 123311403 in words is "one hundred twenty-three million, three hundred eleven thousand, four hundred three".