123403 has 12 divisors (see below), whose sum is σ = 152272. Its totient is φ = 97920.

The previous prime is 123401. The next prime is 123407. The reversal of 123403 is 304321.

It is not a de Polignac number, because 123403 - 2¹ = 123401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1993 + ... + 2053.

2¹²³⁴⁰³ is an apocalyptic number.

123403 is a deficient number, since it is larger than the sum of its proper divisors (28869).

123403 is an equidigital number, since it uses as much as digits as its factorization.

123403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 123403 is about 351.2876314361. The cubic root of 123403 is about 49.7861533629.

Adding to 123403 its reverse (304321), we get a palindrome (427724).

The spelling of 123403 in words is "one hundred twenty-three thousand, four hundred three", and thus it is an iban number.