1279948243547 has 2 divisors, whose sum is σ = 1279948243548. Its totient is φ = 1279948243546.

The previous prime is 1279948243529. The next prime is 1279948243577. The reversal of 1279948243547 is 7453428499721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1279948243547 - 2²⁰ = 1279947194971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1279948243507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639974121773 + 639974121774.

It is an arithmetic number, because the mean of its divisors is an integer number (639974121774).

Almost surely, 2^{1279948243547} is an apocalyptic number.

1279948243547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279948243547 is an equidigital number, since it uses as much as digits as its factorization.

1279948243547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121927680, while the sum is 65.

The spelling of 1279948243547 in words is "one trillion, two hundred seventy-nine billion, nine hundred forty-eight million, two hundred forty-three thousand, five hundred forty-seven".