1287879163 has 4 divisors (see below), whose sum is σ = 1288093968. Its totient is φ = 1287664360.

The previous prime is 1287879083. The next prime is 1287879169. The reversal of 1287879163 is 3619787821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1287879163 is a prime.

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 1287879163.

It is not an unprimeable number, because it can be changed into a prime (1287879169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98143 + ... + 110488.

It is an arithmetic number, because the mean of its divisors is an integer number (322023492).

Almost surely, 2^1287879163 is an apocalyptic number.

1287879163 is a deficient number, since it is larger than the sum of its proper divisors (214805).

1287879163 is an equidigital number, since it uses as much as digits as its factorization.

1287879163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214804.

The product of its digits is 1016064, while the sum is 52.

The square root of 1287879163 is about 35887.0333546812. The cubic root of 1287879163 is about 1087.9903387600.

The spelling of 1287879163 in words is "one billion, two hundred eighty-seven million, eight hundred seventy-nine thousand, one hundred sixty-three".