11644487 has 4 divisors (see below), whose sum is σ = 11709720. Its totient is φ = 11579256.

The previous prime is 11644483. The next prime is 11644517. The reversal of 11644487 is 78444611.

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 11644487 - 2² = 11644483 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 (11644483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32348 + ... + 32705.

It is an arithmetic number, because the mean of its divisors is an integer number (2927430).

Almost surely, 2^11644487 is an apocalyptic number.

11644487 is a deficient number, since it is larger than the sum of its proper divisors (65233).

11644487 is an equidigital number, since it uses as much as digits as its factorization.

11644487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65232.

The product of its digits is 21504, while the sum is 35.

The square root of 11644487 is about 3412.4019399830. The cubic root of 11644487 is about 226.6592531697.

The spelling of 11644487 in words is "eleven million, six hundred forty-four thousand, four hundred eighty-seven".