13347681 has 4 divisors (see below), whose sum is σ = 17796912. Its totient is φ = 8898452.

The previous prime is 13347661. The next prime is 13347683. The reversal of 13347681 is 18674331.

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 13347681 - 2⁶ = 13347617 is a prime.

It is a super-2 number, since 2×13347681² = 356321176155522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13347683) 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, 2224611 + ... + 2224616.

It is an arithmetic number, because the mean of its divisors is an integer number (4449228).

Almost surely, 2^13347681 is an apocalyptic number.

It is an amenable number.

13347681 is a deficient number, since it is larger than the sum of its proper divisors (4449231).

13347681 is an equidigital number, since it uses as much as digits as its factorization.

13347681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4449230.

The product of its digits is 12096, while the sum is 33.

The square root of 13347681 is about 3653.4478236318. The cubic root of 13347681 is about 237.2112450081.

It can be divided in two parts, 13347 and 681, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13347681 in words is "thirteen million, three hundred forty-seven thousand, six hundred eighty-one".