11138591 has 8 divisors (see below), whose sum is σ = 11707344. Its totient is φ = 10584000.

The previous prime is 11138573. The next prime is 11138599. The reversal of 11138591 is 19583111.

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 11138591 - 2⁶ = 11138527 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 (11138599) 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, 1910 + ... + 5091.

It is an arithmetic number, because the mean of its divisors is an integer number (1463418).

Almost surely, 2^11138591 is an apocalyptic number.

11138591 is a deficient number, since it is larger than the sum of its proper divisors (568753).

11138591 is an equidigital number, since it uses as much as digits as its factorization.

11138591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7081.

The product of its digits is 1080, while the sum is 29.

The square root of 11138591 is about 3337.4527712014. The cubic root of 11138591 is about 223.3281246774.

The spelling of 11138591 in words is "eleven million, one hundred thirty-eight thousand, five hundred ninety-one".