11656487 has 4 divisors (see below), whose sum is σ = 11697960. Its totient is φ = 11615016.

The previous prime is 11656457. The next prime is 11656499. The reversal of 11656487 is 78465611.

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 11656487 - 2¹² = 11652391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11656487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11656457) 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, 20312 + ... + 20877.

It is an arithmetic number, because the mean of its divisors is an integer number (2924490).

Almost surely, 2^11656487 is an apocalyptic number.

11656487 is a deficient number, since it is larger than the sum of its proper divisors (41473).

11656487 is an equidigital number, since it uses as much as digits as its factorization.

11656487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41472.

The product of its digits is 40320, while the sum is 38.

The square root of 11656487 is about 3414.1597795065. The cubic root of 11656487 is about 226.7370862036.

The spelling of 11656487 in words is "eleven million, six hundred fifty-six thousand, four hundred eighty-seven".