23403 has 8 divisors (see below), whose sum is σ = 32400. Its totient is φ = 15008.

The previous prime is 23399. The next prime is 23417. The reversal of 23403 is 30432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23403 - 2² = 23399 is a prime.

It is a nialpdrome in base 8 and base 13.

It is not an unprimeable number, because it can be changed into a prime (23473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48 + ... + 221.

It is an arithmetic number, because the mean of its divisors is an integer number (4050).

2²³⁴⁰³ is an apocalyptic number.

23403 is a deficient number, since it is larger than the sum of its proper divisors (8997).

23403 is a wasteful number, since it uses less digits than its factorization.

23403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301.

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 23403 is about 152.9803909003. The cubic root of 23403 is about 28.6038073403.

Adding to 23403 its reverse (30432), we get a palindrome (53835).

The spelling of 23403 in words is "twenty-three thousand, four hundred three", and thus it is an iban number.