2187863 has 2 divisors, whose sum is σ = 2187864. Its totient is φ = 2187862.

The previous prime is 2187851. The next prime is 2187877. The reversal of 2187863 is 3687812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2187863 - 2¹⁰ = 2186839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2187833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1093931 + 1093932.

It is an arithmetic number, because the mean of its divisors is an integer number (1093932).

2^2187863 is an apocalyptic number.

2187863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2187863 is an equidigital number, since it uses as much as digits as its factorization.

2187863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 2187863 is about 1479.1426570821. The cubic root of 2187863 is about 129.8195326267.

The spelling of 2187863 in words is "two million, one hundred eighty-seven thousand, eight hundred sixty-three".