2688785149 has 2 divisors, whose sum is σ = 2688785150. Its totient is φ = 2688785148.

The previous prime is 2688785147. The next prime is 2688785159. The reversal of 2688785149 is 9415878862.

It is a happy number.

2688785149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2606102500 + 82682649 = 51050^2 + 9093^2 .

It is a cyclic number.

It is not a de Polignac number, because 2688785149 - 2¹ = 2688785147 is a prime.

Together with 2688785147, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2688785093 and 2688785102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2688785147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344392574 + 1344392575.

It is an arithmetic number, because the mean of its divisors is an integer number (1344392575).

Almost surely, 2^2688785149 is an apocalyptic number.

It is an amenable number.

2688785149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2688785149 is an equidigital number, since it uses as much as digits as its factorization.

2688785149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 58.

The square root of 2688785149 is about 51853.4969794709. The cubic root of 2688785149 is about 1390.5460217026.

The spelling of 2688785149 in words is "two billion, six hundred eighty-eight million, seven hundred eighty-five thousand, one hundred forty-nine".