11523903 has 4 divisors (see below), whose sum is σ = 15365208. Its totient is φ = 7682600.

The previous prime is 11523887. The next prime is 11523913. The reversal of 11523903 is 30932511.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11523903 - 2⁴ = 11523887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11523913) 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, 1920648 + ... + 1920653.

It is an arithmetic number, because the mean of its divisors is an integer number (3841302).

Almost surely, 2^11523903 is an apocalyptic number.

11523903 is a deficient number, since it is larger than the sum of its proper divisors (3841305).

11523903 is an equidigital number, since it uses as much as digits as its factorization.

11523903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841304.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 11523903 is about 3394.6874672052. The cubic root of 11523903 is about 225.8741500489.

The spelling of 11523903 in words is "eleven million, five hundred twenty-three thousand, nine hundred three".