2689131853 has 4 divisors (see below), whose sum is σ = 2689419420. Its totient is φ = 2688844288.

The previous prime is 2689131839. The next prime is 2689131889. The reversal of 2689131853 is 3581319862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3581319862 = 2 ⋅1790659931.

It can be written as a sum of positive squares in 2 ways, for example, as 1777212649 + 911919204 = 42157^2 + 30198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2689131853 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 (2689131353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129268 + ... + 148621.

It is an arithmetic number, because the mean of its divisors is an integer number (672354855).

Almost surely, 2^2689131853 is an apocalyptic number.

It is an amenable number.

2689131853 is a deficient number, since it is larger than the sum of its proper divisors (287567).

2689131853 is an equidigital number, since it uses as much as digits as its factorization.

2689131853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287566.

The product of its digits is 311040, while the sum is 46.

The square root of 2689131853 is about 51856.8399827834. The cubic root of 2689131853 is about 1390.6057868779.

The spelling of 2689131853 in words is "two billion, six hundred eighty-nine million, one hundred thirty-one thousand, eight hundred fifty-three".