13118643 has 12 divisors (see below), whose sum is σ = 19602960. Its totient is φ = 8444016.

The previous prime is 13118641. The next prime is 13118653. The reversal of 13118643 is 34681131.

13118643 is a `hidden beast` number, since 1 + 3 + 1 + 18 + 643 = 666.

It is not a de Polignac number, because 13118643 - 2¹ = 13118641 is a prime.

It is a super-2 number, since 2×13118643² = 344197588322898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13118641) 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 11 ways as a sum of consecutive naturals, for example, 24871 + ... + 25392.

It is an arithmetic number, because the mean of its divisors is an integer number (1633580).

Almost surely, 2^13118643 is an apocalyptic number.

13118643 is a deficient number, since it is larger than the sum of its proper divisors (6484317).

13118643 is a wasteful number, since it uses less digits than its factorization.

13118643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50298 (or 50295 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 13118643 is about 3621.9667309350. The cubic root of 13118643 is about 235.8466098427.

Adding to 13118643 its reverse (34681131), we get a palindrome (47799774).

The spelling of 13118643 in words is "thirteen million, one hundred eighteen thousand, six hundred forty-three".