11391001 has 8 divisors (see below), whose sum is σ = 11780384. Its totient is φ = 11007360.

The previous prime is 11390999. The next prime is 11391007. The reversal of 11391001 is 10019311.

It is a happy number.

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 11391001 - 2¹ = 11390999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11391007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2806 + ... + 5536.

It is an arithmetic number, because the mean of its divisors is an integer number (1472548).

Almost surely, 2^11391001 is an apocalyptic number.

It is an amenable number.

11391001 is a deficient number, since it is larger than the sum of its proper divisors (389383).

11391001 is an equidigital number, since it uses as much as digits as its factorization.

11391001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 11391001 is about 3375.0557032440. The cubic root of 11391001 is about 225.0024756929.

The spelling of 11391001 in words is "eleven million, three hundred ninety-one thousand, one".