2683663861 has 2 divisors, whose sum is σ = 2683663862. Its totient is φ = 2683663860.

The previous prime is 2683663859. The next prime is 2683663907. The reversal of 2683663861 is 1683663862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1876535761 + 807128100 = 43319^2 + 28410^2 .

It is a cyclic number.

It is not a de Polignac number, because 2683663861 - 2¹ = 2683663859 is a prime.

Together with 2683663859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2683663261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1341831930 + 1341831931.

It is an arithmetic number, because the mean of its divisors is an integer number (1341831931).

Almost surely, 2^2683663861 is an apocalyptic number.

It is an amenable number.

2683663861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2683663861 is an equidigital number, since it uses as much as digits as its factorization.

2683663861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 49.

The square root of 2683663861 is about 51804.0911608340. The cubic root of 2683663861 is about 1389.6626100027.

Subtracting from 2683663861 its reverse (1683663862), we obtain a palindrome (999999999).

The spelling of 2683663861 in words is "two billion, six hundred eighty-three million, six hundred sixty-three thousand, eight hundred sixty-one".