13720599 has 12 divisors (see below), whose sum is σ = 20354776. Its totient is φ = 8899632.

The previous prime is 13720591. The next prime is 13720613. The reversal of 13720599 is 99502731.

13720599 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13720599 - 2³ = 13720591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13720591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20269 + ... + 20934.

Almost surely, 2^13720599 is an apocalyptic number.

13720599 is a deficient number, since it is larger than the sum of its proper divisors (6634177).

13720599 is a wasteful number, since it uses less digits than its factorization.

13720599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41246 (or 41243 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 13720599 is about 3704.1326920077. The cubic root of 13720599 is about 239.4001164146.

It can be divided in two parts, 137 and 20599, that added together give a 4-th power (20736 = 12⁴).

The spelling of 13720599 in words is "thirteen million, seven hundred twenty thousand, five hundred ninety-nine".