1287878752879 has 4 divisors (see below), whose sum is σ = 1287888782200. Its totient is φ = 1287868723560.

The previous prime is 1287878752829. The next prime is 1287878752903. The reversal of 1287878752879 is 9782578787821.

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

It is a cyclic number.

It is not a de Polignac number, because 1287878752879 - 2¹³ = 1287878744687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1287878752799 and 1287878752808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287878752829) 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, 4819512 + ... + 5079709.

It is an arithmetic number, because the mean of its divisors is an integer number (321972195550).

Almost surely, 2^{1287878752879} is an apocalyptic number.

1287878752879 is a deficient number, since it is larger than the sum of its proper divisors (10029321).

1287878752879 is an equidigital number, since it uses as much as digits as its factorization.

1287878752879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10029320.

The product of its digits is 1770209280, while the sum is 79.

The spelling of 1287878752879 in words is "one trillion, two hundred eighty-seven billion, eight hundred seventy-eight million, seven hundred fifty-two thousand, eight hundred seventy-nine".