11988071 has 4 divisors (see below), whose sum is σ = 11995200. Its totient is φ = 11980944.

The previous prime is 11988061. The next prime is 11988091. The reversal of 11988071 is 17088911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11988071 - 2¹⁸ = 11725927 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 (11988061) 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, 515 + ... + 4923.

It is an arithmetic number, because the mean of its divisors is an integer number (2998800).

Almost surely, 2^11988071 is an apocalyptic number.

11988071 is a deficient number, since it is larger than the sum of its proper divisors (7129).

11988071 is an equidigital number, since it uses as much as digits as its factorization.

11988071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7128.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 11988071 is about 3462.3793841808. The cubic root of 11988071 is about 228.8669606021.

The spelling of 11988071 in words is "eleven million, nine hundred eighty-eight thousand, seventy-one".