13687357 has 2 divisors, whose sum is σ = 13687358. Its totient is φ = 13687356.

The previous prime is 13687343. The next prime is 13687403. The reversal of 13687357 is 75378631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8696601 + 4990756 = 2949^2 + 2234^2 .

It is a cyclic number.

It is not a de Polignac number, because 13687357 - 2¹⁹ = 13163069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13687307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6843678 + 6843679.

It is an arithmetic number, because the mean of its divisors is an integer number (6843679).

Almost surely, 2^13687357 is an apocalyptic number.

It is an amenable number.

13687357 is a deficient number, since it is larger than the sum of its proper divisors (1).

13687357 is an equidigital number, since it uses as much as digits as its factorization.

13687357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 13687357 is about 3699.6428205977. The cubic root of 13687357 is about 239.2066220860.

The spelling of 13687357 in words is "thirteen million, six hundred eighty-seven thousand, three hundred fifty-seven".