13717887 has 4 divisors (see below), whose sum is σ = 18290520. Its totient is φ = 9145256.

The previous prime is 13717853. The next prime is 13717909. The reversal of 13717887 is 78871731.

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 13717887 - 2⁸ = 13717631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13717807) 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, 2286312 + ... + 2286317.

It is an arithmetic number, because the mean of its divisors is an integer number (4572630).

Almost surely, 2^13717887 is an apocalyptic number.

13717887 is a deficient number, since it is larger than the sum of its proper divisors (4572633).

13717887 is an equidigital number, since it uses as much as digits as its factorization.

13717887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4572632.

The product of its digits is 65856, while the sum is 42.

The square root of 13717887 is about 3703.7665963179. The cubic root of 13717887 is about 239.3843421787.

The spelling of 13717887 in words is "thirteen million, seven hundred seventeen thousand, eight hundred eighty-seven".