1287868863 has 8 divisors (see below), whose sum is σ = 1718654976. Its totient is φ = 857831000.

The previous prime is 1287868853. The next prime is 1287868871. The reversal of 1287868863 is 3688687821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1287868863 - 2¹⁰ = 1287867839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287868853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183033 + ... + 189938.

It is an arithmetic number, because the mean of its divisors is an integer number (214831872).

Almost surely, 2^1287868863 is an apocalyptic number.

1287868863 is a deficient number, since it is larger than the sum of its proper divisors (430786113).

1287868863 is a wasteful number, since it uses less digits than its factorization.

1287868863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374125.

The product of its digits is 6193152, while the sum is 57.

The square root of 1287868863 is about 35886.8898485227. The cubic root of 1287868863 is about 1087.9874382989.

The spelling of 1287868863 in words is "one billion, two hundred eighty-seven million, eight hundred sixty-eight thousand, eight hundred sixty-three".