1279709942499 has 20 divisors (see below), whose sum is σ = 1952339208864. Its totient is φ = 834988045104.

The previous prime is 1279709942447. The next prime is 1279709942503. The reversal of 1279709942499 is 9942499079721.

1279709942499 is a `hidden beast` number, since 1 + 2 + 7 + 9 + 7 + 0 + 99 + 42 + 499 = 666.

It is not a de Polignac number, because 1279709942499 - 2²⁷ = 1279575724771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1279709942699) 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 19 ways as a sum of consecutive naturals, for example, 168069472 + ... + 168077085.

Almost surely, 2^{1279709942499} is an apocalyptic number.

1279709942499 is a deficient number, since it is larger than the sum of its proper divisors (672629266365).

1279709942499 is an equidigital number, since it uses as much as digits as its factorization.

1279709942499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336146616 (or 336146607 counting only the distinct ones).

The product of its (nonzero) digits is 185177664, while the sum is 72.

The spelling of 1279709942499 in words is "one trillion, two hundred seventy-nine billion, seven hundred nine million, nine hundred forty-two thousand, four hundred ninety-nine".