11915687 has 16 divisors (see below), whose sum is σ = 14395392. Its totient is φ = 9646560.

The previous prime is 11915681. The next prime is 11915693. The reversal of 11915687 is 78651911.

11915687 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11915681) and next prime (11915693).

It is not a de Polignac number, because 11915687 - 2⁴ = 11915671 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 11915687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11915681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8693 + ... + 9969.

It is an arithmetic number, because the mean of its divisors is an integer number (899712).

Almost surely, 2^11915687 is an apocalyptic number.

11915687 is a deficient number, since it is larger than the sum of its proper divisors (2479705).

11915687 is a wasteful number, since it uses less digits than its factorization.

11915687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358.

The product of its digits is 15120, while the sum is 38.

The square root of 11915687 is about 3451.9106303611. The cubic root of 11915687 is about 228.4053973020.

The spelling of 11915687 in words is "eleven million, nine hundred fifteen thousand, six hundred eighty-seven".