2689489879 has 4 divisors (see below), whose sum is σ = 2847695184. Its totient is φ = 2531284576.

The previous prime is 2689489861. The next prime is 2689489921. The reversal of 2689489879 is 9789849862.

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 2689489879 - 2⁹ = 2689489367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2689489379) 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 3 ways as a sum of consecutive naturals, for example, 79102627 + ... + 79102660.

It is an arithmetic number, because the mean of its divisors is an integer number (711923796).

Almost surely, 2^2689489879 is an apocalyptic number.

2689489879 is a deficient number, since it is larger than the sum of its proper divisors (158205305).

2689489879 is a wasteful number, since it uses less digits than its factorization.

2689489879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158205304.

The product of its digits is 125411328, while the sum is 70.

The square root of 2689489879 is about 51860.2919293750. The cubic root of 2689489879 is about 1390.6674983597.

The spelling of 2689489879 in words is "two billion, six hundred eighty-nine million, four hundred eighty-nine thousand, eight hundred seventy-nine".