11503023 has 8 divisors (see below), whose sum is σ = 17528448. Its totient is φ = 6573144.

The previous prime is 11503021. The next prime is 11503039. The reversal of 11503023 is 32030511.

It is a happy number.

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

It is not a de Polignac number, because 11503023 - 2¹ = 11503021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11502993 and 11503011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11503021) 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, 273861 + ... + 273902.

It is an arithmetic number, because the mean of its divisors is an integer number (2191056).

Almost surely, 2^11503023 is an apocalyptic number.

11503023 is a deficient number, since it is larger than the sum of its proper divisors (6025425).

11503023 is an equidigital number, since it uses as much as digits as its factorization.

11503023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547773.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 11503023 is about 3391.6106793086. The cubic root of 11503023 is about 225.7376481605.

Adding to 11503023 its reverse (32030511), we get a palindrome (43533534).

The spelling of 11503023 in words is "eleven million, five hundred three thousand, twenty-three".