11138913 has 12 divisors (see below), whose sum is σ = 16152448. Its totient is φ = 7396920.

The previous prime is 11138909. The next prime is 11138983. The reversal of 11138913 is 31983111.

It is a happy number.

It is not a de Polignac number, because 11138913 - 2² = 11138909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11138903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156 + ... + 4722.

Almost surely, 2^11138913 is an apocalyptic number.

It is an amenable number.

11138913 is a deficient number, since it is larger than the sum of its proper divisors (5013535).

11138913 is a wasteful number, since it uses less digits than its factorization.

11138913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4844 (or 4841 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 11138913 is about 3337.5010112358. The cubic root of 11138913 is about 223.3302766840.

The spelling of 11138913 in words is "eleven million, one hundred thirty-eight thousand, nine hundred thirteen".