12847578349 has 4 divisors (see below), whose sum is σ = 13406168736. Its totient is φ = 12288987964.

The previous prime is 12847578343. The next prime is 12847578371. The reversal of 12847578349 is 94387574821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94387574821 = 73 ⋅1292980477.

It is a cyclic number.

It is not a de Polignac number, because 12847578349 - 2⁷ = 12847578221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12847578293 and 12847578302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12847578343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279295159 + ... + 279295204.

It is an arithmetic number, because the mean of its divisors is an integer number (3351542184).

Almost surely, 2^12847578349 is an apocalyptic number.

It is an amenable number.

12847578349 is a deficient number, since it is larger than the sum of its proper divisors (558590387).

12847578349 is an equidigital number, since it uses as much as digits as its factorization.

12847578349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558590386.

The product of its digits is 13547520, while the sum is 58.

The spelling of 12847578349 in words is "twelve billion, eight hundred forty-seven million, five hundred seventy-eight thousand, three hundred forty-nine".