11717867 has 4 divisors (see below), whose sum is σ = 13391856. Its totient is φ = 10043880.

The previous prime is 11717861. The next prime is 11717869. The reversal of 11717867 is 76871711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76871711 = 7 ⋅10981673.

It is not a de Polignac number, because 11717867 - 2¹⁰ = 11716843 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 11717867.

It is not an unprimeable number, because it can be changed into a prime (11717861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836984 + ... + 836997.

It is an arithmetic number, because the mean of its divisors is an integer number (3347964).

Almost surely, 2^11717867 is an apocalyptic number.

11717867 is a deficient number, since it is larger than the sum of its proper divisors (1673989).

11717867 is an equidigital number, since it uses as much as digits as its factorization.

11717867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673988.

The product of its digits is 16464, while the sum is 38.

The square root of 11717867 is about 3423.1370115729. The cubic root of 11717867 is about 227.1343690097.

The spelling of 11717867 in words is "eleven million, seven hundred seventeen thousand, eight hundred sixty-seven".