1288513867 has 4 divisors (see below), whose sum is σ = 1288766440. Its totient is φ = 1288261296.

The previous prime is 1288513813. The next prime is 1288513903. The reversal of 1288513867 is 7683158821.

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 1288513867 - 2¹⁵ = 1288481099 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 1288513867.

It is not an unprimeable number, because it can be changed into a prime (1283513867) 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, 118473 + ... + 128890.

It is an arithmetic number, because the mean of its divisors is an integer number (322191610).

Almost surely, 2^1288513867 is an apocalyptic number.

1288513867 is a deficient number, since it is larger than the sum of its proper divisors (252573).

1288513867 is an equidigital number, since it uses as much as digits as its factorization.

1288513867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252572.

The product of its digits is 645120, while the sum is 49.

The square root of 1288513867 is about 35895.8753480118. The cubic root of 1288513867 is about 1088.1690404140.

The spelling of 1288513867 in words is "one billion, two hundred eighty-eight million, five hundred thirteen thousand, eight hundred sixty-seven".