13987051788487 has 2 divisors, whose sum is σ = 13987051788488. Its totient is φ = 13987051788486.

The previous prime is 13987051788481. The next prime is 13987051788503. The reversal of 13987051788487 is 78488715078931.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13987051788487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13987051788481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6993525894243 + 6993525894244.

It is an arithmetic number, because the mean of its divisors is an integer number (6993525894244).

Almost surely, 2^{13987051788487} is an apocalyptic number.

13987051788487 is a deficient number, since it is larger than the sum of its proper divisors (1).

13987051788487 is an equidigital number, since it uses as much as digits as its factorization.

13987051788487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 758661120, while the sum is 76.

The spelling of 13987051788487 in words is "thirteen trillion, nine hundred eighty-seven billion, fifty-one million, seven hundred eighty-eight thousand, four hundred eighty-seven".