1279708459847 has 4 divisors (see below), whose sum is σ = 1314295175016. Its totient is φ = 1245121744680.

The previous prime is 1279708459823. The next prime is 1279708459951. The reversal of 1279708459847 is 7489548079721.

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 1279708459847 - 2²⁰ = 1279707411271 is a prime.

It is a super-2 number, since 2×1279708459847² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279708429847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17293357529 + ... + 17293357602.

It is an arithmetic number, because the mean of its divisors is an integer number (328573793754).

Almost surely, 2^{1279708459847} is an apocalyptic number.

1279708459847 is a deficient number, since it is larger than the sum of its proper divisors (34586715169).

1279708459847 is an equidigital number, since it uses as much as digits as its factorization.

1279708459847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34586715168.

The product of its (nonzero) digits is 284497920, while the sum is 71.

The spelling of 1279708459847 in words is "one trillion, two hundred seventy-nine billion, seven hundred eight million, four hundred fifty-nine thousand, eight hundred forty-seven".