2180863 has 2 divisors, whose sum is σ = 2180864. Its totient is φ = 2180862.

The previous prime is 2180833. The next prime is 2180873. The reversal of 2180863 is 3680812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2180863 - 2⁹ = 2180351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2180803) 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 as a sum of consecutive naturals, namely, 1090431 + 1090432.

It is an arithmetic number, because the mean of its divisors is an integer number (1090432).

2^2180863 is an apocalyptic number.

2180863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2180863 is an equidigital number, since it uses as much as digits as its factorization.

2180863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2180863 is about 1476.7745257825. The cubic root of 2180863 is about 129.6809335138.

It can be divided in two parts, 218086 and 3, that added together give a square (218089 = 467²).

The spelling of 2180863 in words is "two million, one hundred eighty thousand, eight hundred sixty-three".