13680747 has 6 divisors (see below), whose sum is σ = 19761092. Its totient is φ = 9120492.

The previous prime is 13680739. The next prime is 13680749. The reversal of 13680747 is 74708631.

It is not a de Polignac number, because 13680747 - 2³ = 13680739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13680749) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 760033 + ... + 760050.

Almost surely, 2^13680747 is an apocalyptic number.

13680747 is a deficient number, since it is larger than the sum of its proper divisors (6080345).

13680747 is a wasteful number, since it uses less digits than its factorization.

13680747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520089 (or 1520086 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 13680747 is about 3698.7493832375. The cubic root of 13680747 is about 239.1681094068.

The spelling of 13680747 in words is "thirteen million, six hundred eighty thousand, seven hundred forty-seven".