13775138987 has 2 divisors, whose sum is σ = 13775138988. Its totient is φ = 13775138986.

The previous prime is 13775138983. The next prime is 13775139067. The reversal of 13775138987 is 78983157731.

It is a weak prime.

It is an emirp because it is prime and its reverse (78983157731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13775138987 - 2² = 13775138983 is a prime.

It is a super-2 number, since 2×13775138987² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13775138983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6887569493 + 6887569494.

It is an arithmetic number, because the mean of its divisors is an integer number (6887569494).

Almost surely, 2^13775138987 is an apocalyptic number.

13775138987 is a deficient number, since it is larger than the sum of its proper divisors (1).

13775138987 is an equidigital number, since it uses as much as digits as its factorization.

13775138987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8890560, while the sum is 59.

The spelling of 13775138987 in words is "thirteen billion, seven hundred seventy-five million, one hundred thirty-eight thousand, nine hundred eighty-seven".