23453503 has 4 divisors (see below), whose sum is σ = 23851080. Its totient is φ = 23055928.

The previous prime is 23453497. The next prime is 23453509. The reversal of 23453503 is 30535432.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (23453497) and next prime (23453509).

It is a cyclic number.

It is not a de Polignac number, because 23453503 - 2⁹ = 23452991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23453509) 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, 198700 + ... + 198817.

It is an arithmetic number, because the mean of its divisors is an integer number (5962770).

Almost surely, 2^23453503 is an apocalyptic number.

23453503 is a deficient number, since it is larger than the sum of its proper divisors (397577).

23453503 is an equidigital number, since it uses as much as digits as its factorization.

23453503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397576.

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 23453503 is about 4842.8816834608. The cubic root of 23453503 is about 286.2436795513.

Adding to 23453503 its reverse (30535432), we get a palindrome (53988935).

The spelling of 23453503 in words is "twenty-three million, four hundred fifty-three thousand, five hundred three".