11971318 has 4 divisors (see below), whose sum is σ = 17956980. Its totient is φ = 5985658.

The previous prime is 11971261. The next prime is 11971321. The reversal of 11971318 is 81317911.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11971318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2992828 + ... + 2992831.

It is an arithmetic number, because the mean of its divisors is an integer number (4489245).

Almost surely, 2^11971318 is an apocalyptic number.

11971318 is a deficient number, since it is larger than the sum of its proper divisors (5985662).

11971318 is an equidigital number, since it uses as much as digits as its factorization.

11971318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5985661.

The product of its digits is 1512, while the sum is 31.

The square root of 11971318 is about 3459.9592483149. The cubic root of 11971318 is about 228.7602991372.

The spelling of 11971318 in words is "eleven million, nine hundred seventy-one thousand, three hundred eighteen".