13681747 has 4 divisors (see below), whose sum is σ = 13972896. Its totient is φ = 13390600.

The previous prime is 13681739. The next prime is 13681777. The reversal of 13681747 is 74718631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13681747 - 2³ = 13681739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13681727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145504 + ... + 145597.

It is an arithmetic number, because the mean of its divisors is an integer number (3493224).

Almost surely, 2^13681747 is an apocalyptic number.

13681747 is a deficient number, since it is larger than the sum of its proper divisors (291149).

13681747 is an equidigital number, since it uses as much as digits as its factorization.

13681747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291148.

The product of its digits is 28224, while the sum is 37.

The square root of 13681747 is about 3698.8845615942. The cubic root of 13681747 is about 239.1739366296.

The spelling of 13681747 in words is "thirteen million, six hundred eighty-one thousand, seven hundred forty-seven".