11903523 has 4 divisors (see below), whose sum is σ = 15871368. Its totient is φ = 7935680.

The previous prime is 11903503. The next prime is 11903527. The reversal of 11903523 is 32530911.

It is a happy number.

11903523 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 11903523 - 2⁵ = 11903491 is a prime.

It is a super-3 number, since 3×11903523³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11903493 and 11903502.

It is not an unprimeable number, because it can be changed into a prime (11903527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1983918 + ... + 1983923.

It is an arithmetic number, because the mean of its divisors is an integer number (3967842).

Almost surely, 2^11903523 is an apocalyptic number.

11903523 is a deficient number, since it is larger than the sum of its proper divisors (3967845).

11903523 is an equidigital number, since it uses as much as digits as its factorization.

11903523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967844.

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

The square root of 11903523 is about 3450.1482576840. The cubic root of 11903523 is about 228.3276491147.

The spelling of 11903523 in words is "eleven million, nine hundred three thousand, five hundred twenty-three".