13720187 has 4 divisors (see below), whose sum is σ = 14775600. Its totient is φ = 12664776.

The previous prime is 13720169. The next prime is 13720211. The reversal of 13720187 is 78102731.

13720187 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 13720187 - 2¹⁰ = 13719163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13720127) 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, 527687 + ... + 527712.

It is an arithmetic number, because the mean of its divisors is an integer number (3693900).

Almost surely, 2^13720187 is an apocalyptic number.

13720187 is a deficient number, since it is larger than the sum of its proper divisors (1055413).

13720187 is a wasteful number, since it uses less digits than its factorization.

13720187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055412.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 13720187 is about 3704.0770780317. The cubic root of 13720187 is about 239.3977201676.

The spelling of 13720187 in words is "thirteen million, seven hundred twenty thousand, one hundred eighty-seven".