11987913 has 8 divisors (see below), whose sum is σ = 18267328. Its totient is φ = 6850224.

The previous prime is 11987909. The next prime is 11987923. The reversal of 11987913 is 31978911.

11987913 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11987913 - 2² = 11987909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11987923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285406 + ... + 285447.

It is an arithmetic number, because the mean of its divisors is an integer number (2283416).

Almost surely, 2^11987913 is an apocalyptic number.

It is an amenable number.

11987913 is a deficient number, since it is larger than the sum of its proper divisors (6279415).

11987913 is an equidigital number, since it uses as much as digits as its factorization.

11987913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570863.

The product of its digits is 13608, while the sum is 39.

The square root of 11987913 is about 3462.3565674263. The cubic root of 11987913 is about 228.8659551265.

The spelling of 11987913 in words is "eleven million, nine hundred eighty-seven thousand, nine hundred thirteen".