11327991 has 8 divisors (see below), whose sum is σ = 15144960. Its totient is φ = 7531512.

The previous prime is 11327977. The next prime is 11328017. The reversal of 11327991 is 19972311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11327991 - 2⁵ = 11327959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11329991) 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, 3781 + ... + 6078.

It is an arithmetic number, because the mean of its divisors is an integer number (1893120).

Almost surely, 2^11327991 is an apocalyptic number.

11327991 is a deficient number, since it is larger than the sum of its proper divisors (3816969).

11327991 is an equidigital number, since it uses as much as digits as its factorization.

11327991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10245.

The product of its digits is 3402, while the sum is 33.

The square root of 11327991 is about 3365.7080978599. The cubic root of 11327991 is about 224.5868368426.

The spelling of 11327991 in words is "eleven million, three hundred twenty-seven thousand, nine hundred ninety-one".