2801863 has 2 divisors, whose sum is σ = 2801864. Its totient is φ = 2801862.

The previous prime is 2801857. The next prime is 2801891. The reversal of 2801863 is 3681082.

It is an a-pointer prime, because the next prime (2801891) can be obtained adding 2801863 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2801863 - 2¹⁷ = 2670791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2801803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1400931 + 1400932.

It is an arithmetic number, because the mean of its divisors is an integer number (1400932).

2^2801863 is an apocalyptic number.

2801863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2801863 is an equidigital number, since it uses as much as digits as its factorization.

2801863 is an evil number, because the sum of its binary digits is even.

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

The square root of 2801863 is about 1673.8766382264. The cubic root of 2801863 is about 140.9772275145.

The spelling of 2801863 in words is "two million, eight hundred one thousand, eight hundred sixty-three".