11327981 has 8 divisors (see below), whose sum is σ = 13005120. Its totient is φ = 9665568.

The previous prime is 11327977. The next prime is 11328017. The reversal of 11327981 is 18972311.

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

It is a cyclic number.

It is not a de Polignac number, because 11327981 - 2² = 11327977 is a prime.

It is a super-2 number, since 2×11327981² = 256646307072722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11327681) 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, 1976 + ... + 5153.

It is an arithmetic number, because the mean of its divisors is an integer number (1625640).

Almost surely, 2^11327981 is an apocalyptic number.

It is an amenable number.

11327981 is a deficient number, since it is larger than the sum of its proper divisors (1677139).

11327981 is an equidigital number, since it uses as much as digits as its factorization.

11327981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7363.

The product of its digits is 3024, while the sum is 32.

The square root of 11327981 is about 3365.7066122881. The cubic root of 11327981 is about 224.5867707565.

The spelling of 11327981 in words is "eleven million, three hundred twenty-seven thousand, nine hundred eighty-one".