11984947 has 4 divisors (see below), whose sum is σ = 12906880. Its totient is φ = 11063016.

The previous prime is 11984939. The next prime is 11984957. The reversal of 11984947 is 74948911.

11984947 is digitally balanced in base 2, 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: 74948911 = 179 ⋅418709.

It is a cyclic number.

It is not a de Polignac number, because 11984947 - 2³ = 11984939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11984957) 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, 460947 + ... + 460972.

It is an arithmetic number, because the mean of its divisors is an integer number (3226720).

Almost surely, 2^11984947 is an apocalyptic number.

11984947 is a deficient number, since it is larger than the sum of its proper divisors (921933).

11984947 is an equidigital number, since it uses as much as digits as its factorization.

11984947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921932.

The product of its digits is 72576, while the sum is 43.

The square root of 11984947 is about 3461.9282199376. The cubic root of 11984947 is about 228.8470785461.

The spelling of 11984947 in words is "eleven million, nine hundred eighty-four thousand, nine hundred forty-seven".