11947487 has 4 divisors (see below), whose sum is σ = 11958480. Its totient is φ = 11936496.

The previous prime is 11947483. The next prime is 11947489. The reversal of 11947487 is 78474911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11947487 - 2² = 11947483 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 (11947483) 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, 3662 + ... + 6107.

It is an arithmetic number, because the mean of its divisors is an integer number (2989620).

Almost surely, 2^11947487 is an apocalyptic number.

11947487 is a deficient number, since it is larger than the sum of its proper divisors (10993).

11947487 is an equidigital number, since it uses as much as digits as its factorization.

11947487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10992.

The product of its digits is 56448, while the sum is 41.

The square root of 11947487 is about 3456.5137060339. The cubic root of 11947487 is about 228.6084025195.

The spelling of 11947487 in words is "eleven million, nine hundred forty-seven thousand, four hundred eighty-seven".