13518891 has 6 divisors (see below), whose sum is σ = 19527300. Its totient is φ = 9012588.

The previous prime is 13518887. The next prime is 13518977. The reversal of 13518891 is 19881531.

It is not a de Polignac number, because 13518891 - 2² = 13518887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13518811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 751041 + ... + 751058.

It is an arithmetic number, because the mean of its divisors is an integer number (3254550).

Almost surely, 2^13518891 is an apocalyptic number.

13518891 is a deficient number, since it is larger than the sum of its proper divisors (6008409).

13518891 is a wasteful number, since it uses less digits than its factorization.

13518891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502105 (or 1502102 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 13518891 is about 3676.8044549581. The cubic root of 13518891 is about 238.2211711900.

The spelling of 13518891 in words is "thirteen million, five hundred eighteen thousand, eight hundred ninety-one".