1288913890139 has 4 divisors (see below), whose sum is σ = 1288916909280. Its totient is φ = 1288910871000.

The previous prime is 1288913890093. The next prime is 1288913890181. The reversal of 1288913890139 is 9310983198821.

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-1288913890139 is a prime.

It is a super-2 number, since 2×1288913890139² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288913890039) 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, 737612 + ... + 1766889.

It is an arithmetic number, because the mean of its divisors is an integer number (322229227320).

Almost surely, 2^{1288913890139} is an apocalyptic number.

1288913890139 is a deficient number, since it is larger than the sum of its proper divisors (3019141).

1288913890139 is an equidigital number, since it uses as much as digits as its factorization.

1288913890139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019140.

The product of its (nonzero) digits is 6718464, while the sum is 62.

The spelling of 1288913890139 in words is "one trillion, two hundred eighty-eight billion, nine hundred thirteen million, eight hundred ninety thousand, one hundred thirty-nine".