11681503 has 4 divisors (see below), whose sum is σ = 11822328. Its totient is φ = 11540680.

The previous prime is 11681491. The next prime is 11681543. The reversal of 11681503 is 30518611.

11681503 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, and also an emirpimes, since its reverse is a distinct semiprime: 30518611 = 1201 ⋅25411.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11681503 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 (11681543) 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, 70288 + ... + 70453.

It is an arithmetic number, because the mean of its divisors is an integer number (2955582).

Almost surely, 2^11681503 is an apocalyptic number.

11681503 is a deficient number, since it is larger than the sum of its proper divisors (140825).

11681503 is an equidigital number, since it uses as much as digits as its factorization.

11681503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140824.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 11681503 is about 3417.8213821088. The cubic root of 11681503 is about 226.8991705485.

The spelling of 11681503 in words is "eleven million, six hundred eighty-one thousand, five hundred three".