2787859 has 2 divisors, whose sum is σ = 2787860. Its totient is φ = 2787858.

The previous prime is 2787781. The next prime is 2787907. The reversal of 2787859 is 9587872.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2787859 is a prime.

2787859 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2787259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1393929 + 1393930.

It is an arithmetic number, because the mean of its divisors is an integer number (1393930).

2^2787859 is an apocalyptic number.

2787859 is a deficient number, since it is larger than the sum of its proper divisors (1).

2787859 is an equidigital number, since it uses as much as digits as its factorization.

2787859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 46.

The square root of 2787859 is about 1669.6882942633. The cubic root of 2787859 is about 140.7419622145.

The spelling of 2787859 in words is "two million, seven hundred eighty-seven thousand, eight hundred fifty-nine".