13138487 has 2 divisors, whose sum is σ = 13138488. Its totient is φ = 13138486.

The previous prime is 13138471. The next prime is 13138493. The reversal of 13138487 is 78483131.

It is a strong prime.

It is an emirp because it is prime and its reverse (78483131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13138487 - 2⁴ = 13138471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13138457) 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, 6569243 + 6569244.

It is an arithmetic number, because the mean of its divisors is an integer number (6569244).

Almost surely, 2^13138487 is an apocalyptic number.

13138487 is a deficient number, since it is larger than the sum of its proper divisors (1).

13138487 is an equidigital number, since it uses as much as digits as its factorization.

13138487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 13138487 is about 3624.7050914523. The cubic root of 13138487 is about 235.9654682311.

The spelling of 13138487 in words is "thirteen million, one hundred thirty-eight thousand, four hundred eighty-seven".