1279708459823 has 2 divisors, whose sum is σ = 1279708459824. Its totient is φ = 1279708459822.

The previous prime is 1279708459787. The next prime is 1279708459951. The reversal of 1279708459823 is 3289548079721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1279708459823 - 2²⁸ = 1279440024367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1279708459823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1279708459123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639854229911 + 639854229912.

It is an arithmetic number, because the mean of its divisors is an integer number (639854229912).

Almost surely, 2^{1279708459823} is an apocalyptic number.

1279708459823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279708459823 is an equidigital number, since it uses as much as digits as its factorization.

1279708459823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60963840, while the sum is 65.

The spelling of 1279708459823 in words is "one trillion, two hundred seventy-nine billion, seven hundred eight million, four hundred fifty-nine thousand, eight hundred twenty-three".