2587789 has 2 divisors, whose sum is σ = 2587790. Its totient is φ = 2587788.

The previous prime is 2587771. The next prime is 2587801. The reversal of 2587789 is 9877852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2175625 + 412164 = 1475^2 + 642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2587789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2587709) 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, 1293894 + 1293895.

It is an arithmetic number, because the mean of its divisors is an integer number (1293895).

2^2587789 is an apocalyptic number.

It is an amenable number.

2587789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2587789 is an equidigital number, since it uses as much as digits as its factorization.

2587789 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 2587789 is about 1608.6606230029. The cubic root of 2587789 is about 137.2912800252.

The spelling of 2587789 in words is "two million, five hundred eighty-seven thousand, seven hundred eighty-nine".