12784049539 has 2 divisors, whose sum is σ = 12784049540. Its totient is φ = 12784049538.

The previous prime is 12784049527. The next prime is 12784049557. The reversal of 12784049539 is 93594048721.

It is a weak prime.

It is an emirp because it is prime and its reverse (93594048721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12784049539 - 2²¹ = 12781952387 is a prime.

It is a super-2 number, since 2×12784049539² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12784049569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6392024769 + 6392024770.

It is an arithmetic number, because the mean of its divisors is an integer number (6392024770).

Almost surely, 2^12784049539 is an apocalyptic number.

12784049539 is a deficient number, since it is larger than the sum of its proper divisors (1).

12784049539 is an equidigital number, since it uses as much as digits as its factorization.

12784049539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 12784049539 in words is "twelve billion, seven hundred eighty-four million, forty-nine thousand, five hundred thirty-nine".