1299247342779 has 16 divisors (see below), whose sum is σ = 1762377537024. Its totient is φ = 851219476800.

The previous prime is 1299247342751. The next prime is 1299247342793. The reversal of 1299247342779 is 9772437429921.

It is not a de Polignac number, because 1299247342779 - 2¹³ = 1299247334587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1299247342279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9740434 + ... + 9872919.

It is an arithmetic number, because the mean of its divisors is an integer number (110148596064).

Almost surely, 2^{1299247342779} is an apocalyptic number.

1299247342779 is a deficient number, since it is larger than the sum of its proper divisors (463130194245).

1299247342779 is a wasteful number, since it uses less digits than its factorization.

1299247342779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19613738.

The product of its digits is 96018048, while the sum is 66.

The spelling of 1299247342779 in words is "one trillion, two hundred ninety-nine billion, two hundred forty-seven million, three hundred forty-two thousand, seven hundred seventy-nine".