11138549 has 4 divisors (see below), whose sum is σ = 11304864. Its totient is φ = 10972236.

The previous prime is 11138527. The next prime is 11138563. The reversal of 11138549 is 94583111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11138549 - 2⁸ = 11138293 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 3 ways as a sum of consecutive naturals, for example, 83057 + ... + 83190.

It is an arithmetic number, because the mean of its divisors is an integer number (2826216).

Almost surely, 2^11138549 is an apocalyptic number.

It is an amenable number.

11138549 is a deficient number, since it is larger than the sum of its proper divisors (166315).

11138549 is an equidigital number, since it uses as much as digits as its factorization.

11138549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166314.

The product of its digits is 4320, while the sum is 32.

The square root of 11138549 is about 3337.4464789716. The cubic root of 11138549 is about 223.3278439778.

The spelling of 11138549 in words is "eleven million, one hundred thirty-eight thousand, five hundred forty-nine".