23909503 has 2 divisors, whose sum is σ = 23909504. Its totient is φ = 23909502.

The previous prime is 23909453. The next prime is 23909521. The reversal of 23909503 is 30590932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23909503 - 2¹⁷ = 23778431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23909563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11954751 + 11954752.

It is an arithmetic number, because the mean of its divisors is an integer number (11954752).

Almost surely, 2^23909503 is an apocalyptic number.

23909503 is a deficient number, since it is larger than the sum of its proper divisors (1).

23909503 is an equidigital number, since it uses as much as digits as its factorization.

23909503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 23909503 is about 4889.7344508674. The cubic root of 23909503 is about 288.0869039117.

The spelling of 23909503 in words is "twenty-three million, nine hundred nine thousand, five hundred three".