11687813 has 8 divisors (see below), whose sum is σ = 11911680. Its totient is φ = 11466000.

The previous prime is 11687803. The next prime is 11687827. The reversal of 11687813 is 31878611.

11687813 is digitally balanced in base 2, 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 a cyclic number.

It is not a de Polignac number, because 11687813 - 2¹² = 11683717 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 (11687803) 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, 15188 + ... + 15938.

It is an arithmetic number, because the mean of its divisors is an integer number (1488960).

Almost surely, 2^11687813 is an apocalyptic number.

It is an amenable number.

11687813 is a deficient number, since it is larger than the sum of its proper divisors (223867).

11687813 is an equidigital number, since it uses as much as digits as its factorization.

11687813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027.

The product of its digits is 8064, while the sum is 35.

The square root of 11687813 is about 3418.7443601416. The cubic root of 11687813 is about 226.9400179192.

The spelling of 11687813 in words is "eleven million, six hundred eighty-seven thousand, eight hundred thirteen".