11518913 has 4 divisors (see below), whose sum is σ = 13164480. Its totient is φ = 9873348.

The previous prime is 11518907. The next prime is 11518919. The reversal of 11518913 is 31981511.

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 an interprime number because it is at equal distance from previous prime (11518907) and next prime (11518919).

It is a cyclic number.

It is not a de Polignac number, because 11518913 - 2¹⁴ = 11502529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11518919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822773 + ... + 822786.

It is an arithmetic number, because the mean of its divisors is an integer number (3291120).

Almost surely, 2^11518913 is an apocalyptic number.

It is an amenable number.

11518913 is a deficient number, since it is larger than the sum of its proper divisors (1645567).

11518913 is an equidigital number, since it uses as much as digits as its factorization.

11518913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645566.

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

The square root of 11518913 is about 3393.9524156947. The cubic root of 11518913 is about 225.8415431930.

The spelling of 11518913 in words is "eleven million, five hundred eighteen thousand, nine hundred thirteen".