13987579 has 2 divisors, whose sum is σ = 13987580. Its totient is φ = 13987578.

The previous prime is 13987573. The next prime is 13987613. The reversal of 13987579 is 97578931.

It is a weak prime.

It is an emirp because it is prime and its reverse (97578931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13987579 - 2¹³ = 13979387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13987573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6993789 + 6993790.

It is an arithmetic number, because the mean of its divisors is an integer number (6993790).

Almost surely, 2^13987579 is an apocalyptic number.

13987579 is a deficient number, since it is larger than the sum of its proper divisors (1).

13987579 is an equidigital number, since it uses as much as digits as its factorization.

13987579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 49.

The square root of 13987579 is about 3739.9971925123. The cubic root of 13987579 is about 240.9429282395.

The spelling of 13987579 in words is "thirteen million, nine hundred eighty-seven thousand, five hundred seventy-nine".