1380787904329 has 4 divisors (see below), whose sum is σ = 1388769337476. Its totient is φ = 1372806471184.

The previous prime is 1380787904257. The next prime is 1380787904339. The reversal of 1380787904329 is 9234097870831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1029873839929 + 350914064400 = 1014827^2 + 592380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1380787904329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1380787904339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3990716314 + ... + 3990716659.

It is an arithmetic number, because the mean of its divisors is an integer number (347192334369).

Almost surely, 2^{1380787904329} is an apocalyptic number.

It is an amenable number.

1380787904329 is a deficient number, since it is larger than the sum of its proper divisors (7981433147).

1380787904329 is an equidigital number, since it uses as much as digits as its factorization.

1380787904329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7981433146.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 1380787904329 in words is "one trillion, three hundred eighty billion, seven hundred eighty-seven million, nine hundred four thousand, three hundred twenty-nine".