13897987539 has 8 divisors (see below), whose sum is σ = 18753911232. Its totient is φ = 9153694440.

The previous prime is 13897987531. The next prime is 13897987553. The reversal of 13897987539 is 93578979831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13897987539 - 2³ = 13897987531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13897987531) 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 in 7 ways as a sum of consecutive naturals, for example, 27907357 + ... + 27907854.

It is an arithmetic number, because the mean of its divisors is an integer number (2344238904).

Almost surely, 2^13897987539 is an apocalyptic number.

13897987539 is a deficient number, since it is larger than the sum of its proper divisors (4855923693).

13897987539 is an equidigital number, since it uses as much as digits as its factorization.

13897987539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55815297.

The product of its digits is 102876480, while the sum is 69.

The spelling of 13897987539 in words is "thirteen billion, eight hundred ninety-seven million, nine hundred eighty-seven thousand, five hundred thirty-nine".