2681863 has 2 divisors, whose sum is σ = 2681864. Its totient is φ = 2681862.

The previous prime is 2681857. The next prime is 2681873. The reversal of 2681863 is 3681862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2681863 - 2¹⁷ = 2550791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2681803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340931 + 1340932.

It is an arithmetic number, because the mean of its divisors is an integer number (1340932).

2^2681863 is an apocalyptic number.

2681863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2681863 is an equidigital number, since it uses as much as digits as its factorization.

2681863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 2681863 is about 1637.6394597102. The cubic root of 2681863 is about 138.9351698090.

Subtracting 2681863 from its reverse (3681862), we obtain a palindrome (999999).

It can be divided in two parts, 2 and 681863, that multiplied together give a triangular number (1363726 = T₁₆₅₁).

The spelling of 2681863 in words is "two million, six hundred eighty-one thousand, eight hundred sixty-three".