12489549139 has 4 divisors (see below), whose sum is σ = 12525542424. Its totient is φ = 12453555856.

The previous prime is 12489549131. The next prime is 12489549143. The reversal of 12489549139 is 93194598421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12489549139 - 2³ = 12489549131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12489549139.

It is not an unprimeable number, because it can be changed into a prime (12489549131) 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 3 ways as a sum of consecutive naturals, for example, 17996122 + ... + 17996815.

It is an arithmetic number, because the mean of its divisors is an integer number (3131385606).

Almost surely, 2^12489549139 is an apocalyptic number.

12489549139 is a deficient number, since it is larger than the sum of its proper divisors (35993285).

12489549139 is an equidigital number, since it uses as much as digits as its factorization.

12489549139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35993284.

The product of its digits is 2799360, while the sum is 55.

The spelling of 12489549139 in words is "twelve billion, four hundred eighty-nine million, five hundred forty-nine thousand, one hundred thirty-nine".