1279797696 has 42 divisors (see below), whose sum is σ = 3668310672. Its totient is φ = 426599040.

The previous prime is 1279797679. The next prime is 1279797719. The reversal of 1279797696 is 6967979721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1110360 + ... + 1111511.

Almost surely, 2^1279797696 is an apocalyptic number.

1279797696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1279797696 is an abundant number, since it is smaller than the sum of its proper divisors (2388512976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1279797696 is a wasteful number, since it uses less digits than its factorization.

1279797696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221889 (or 2221876 counting only the distinct ones).

The product of its digits is 18003384, while the sum is 63.

The square root of 1279797696 is about 35774.2602439240. The cubic root of 1279797696 is about 1085.7098417969.

The spelling of 1279797696 in words is "one billion, two hundred seventy-nine million, seven hundred ninety-seven thousand, six hundred ninety-six".