13978569587 has 2 divisors, whose sum is σ = 13978569588. Its totient is φ = 13978569586.

The previous prime is 13978569581. The next prime is 13978569593. The reversal of 13978569587 is 78596587931.

It is a balanced prime because it is at equal distance from previous prime (13978569581) and next prime (13978569593).

It is an emirp because it is prime and its reverse (78596587931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13978569587 - 2⁸ = 13978569331 is a prime.

It is not a weakly prime, because it can be changed into another prime (13978569581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6989284793 + 6989284794.

It is an arithmetic number, because the mean of its divisors is an integer number (6989284794).

Almost surely, 2^13978569587 is an apocalyptic number.

13978569587 is a deficient number, since it is larger than the sum of its proper divisors (1).

13978569587 is an equidigital number, since it uses as much as digits as its factorization.

13978569587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 114307200, while the sum is 68.

The spelling of 13978569587 in words is "thirteen billion, nine hundred seventy-eight million, five hundred sixty-nine thousand, five hundred eighty-seven".