11491139 has 8 divisors (see below), whose sum is σ = 12579840. Its totient is φ = 10409800.

The previous prime is 11491097. The next prime is 11491153. The reversal of 11491139 is 93119411.

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 11491139 - 2¹² = 11487043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11491159) 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, 1742 + ... + 5100.

It is an arithmetic number, because the mean of its divisors is an integer number (1572480).

Almost surely, 2^11491139 is an apocalyptic number.

11491139 is a deficient number, since it is larger than the sum of its proper divisors (1088701).

11491139 is a wasteful number, since it uses less digits than its factorization.

11491139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3681.

The product of its digits is 972, while the sum is 29.

The square root of 11491139 is about 3389.8582566237. The cubic root of 11491139 is about 225.6598833683.

The spelling of 11491139 in words is "eleven million, four hundred ninety-one thousand, one hundred thirty-nine".