2688785213 has 2 divisors, whose sum is σ = 2688785214. Its totient is φ = 2688785212.

The previous prime is 2688785201. The next prime is 2688785221. The reversal of 2688785213 is 3125878862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1556933764 + 1131851449 = 39458^2 + 33643^2 .

It is a cyclic number.

It is not a de Polignac number, because 2688785213 - 2⁶ = 2688785149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2688785243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344392606 + 1344392607.

It is an arithmetic number, because the mean of its divisors is an integer number (1344392607).

Almost surely, 2^2688785213 is an apocalyptic number.

It is an amenable number.

2688785213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2688785213 is an equidigital number, since it uses as much as digits as its factorization.

2688785213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1290240, while the sum is 50.

The square root of 2688785213 is about 51853.4975965942. The cubic root of 2688785213 is about 1390.5460327354.

The spelling of 2688785213 in words is "two billion, six hundred eighty-eight million, seven hundred eighty-five thousand, two hundred thirteen".