11647987 has 12 divisors (see below), whose sum is σ = 12722160. Its totient is φ = 10659168.

The previous prime is 11647973. The next prime is 11647991. The reversal of 11647987 is 78974611.

It is not a de Polignac number, because 11647987 - 2²³ = 3259379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11647967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26314 + ... + 26752.

It is an arithmetic number, because the mean of its divisors is an integer number (1060180).

Almost surely, 2^11647987 is an apocalyptic number.

11647987 is a deficient number, since it is larger than the sum of its proper divisors (1074173).

11647987 is a wasteful number, since it uses less digits than its factorization.

11647987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 609 counting only the distinct ones).

The product of its digits is 84672, while the sum is 43.

The square root of 11647987 is about 3412.9147367023. The cubic root of 11647987 is about 226.6819599927.

The spelling of 11647987 in words is "eleven million, six hundred forty-seven thousand, nine hundred eighty-seven".