13687787 has 2 divisors, whose sum is σ = 13687788. Its totient is φ = 13687786.

The previous prime is 13687741. The next prime is 13687789. The reversal of 13687787 is 78778631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13687787 - 2¹⁰ = 13686763 is a prime.

Together with 13687789, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13687789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6843893 + 6843894.

It is an arithmetic number, because the mean of its divisors is an integer number (6843894).

Almost surely, 2^13687787 is an apocalyptic number.

13687787 is a deficient number, since it is larger than the sum of its proper divisors (1).

13687787 is an equidigital number, since it uses as much as digits as its factorization.

13687787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 47.

The square root of 13687787 is about 3699.7009338594. The cubic root of 13687787 is about 239.2091270198.

The spelling of 13687787 in words is "thirteen million, six hundred eighty-seven thousand, seven hundred eighty-seven".