1280692832329 has 3 divisors (see below), whose sum is σ = 1280693964007. Its totient is φ = 1280691700652.

The previous prime is 1280692832323. The next prime is 1280692832339. The reversal of 1280692832329 is 9232382960821.

The square root of 1280692832329 is 1131677.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 713002916025 + 567689916304 = 844395^2 + 753452^2 .

It is not a de Polignac number, because 1280692832329 - 2²⁵ = 1280659277897 is a prime.

It is a super-2 number, since 2×1280692832329² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1280692832329.

It is not an unprimeable number, because it can be changed into a prime (1280692832323) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 565839 + ... + 1697515.

Almost surely, 2^{1280692832329} is an apocalyptic number.

1280692832329 is the 1131677-th square number.

1280692832329 is the 565839-th centered octagonal number.

It is an amenable number.

1280692832329 is a deficient number, since it is larger than the sum of its proper divisors (1131678).

1280692832329 is an frugal number, since it uses more digits than its factorization.

1280692832329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263354 (or 1131677 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 1280692832329 in words is "one trillion, two hundred eighty billion, six hundred ninety-two million, eight hundred thirty-two thousand, three hundred twenty-nine".