2887789 has 2 divisors, whose sum is σ = 2887790. Its totient is φ = 2887788.

The previous prime is 2887777. The next prime is 2887793. The reversal of 2887789 is 9877882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2778889 + 108900 = 1667^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 2887789 - 2²¹ = 790637 is a prime.

It is an Ulam number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2887799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1443894 + 1443895.

It is an arithmetic number, because the mean of its divisors is an integer number (1443895).

2^2887789 is an apocalyptic number.

It is an amenable number.

2887789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2887789 is an equidigital number, since it uses as much as digits as its factorization.

2887789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 49.

The square root of 2887789 is about 1699.3495814576. The cubic root of 2887789 is about 142.4038789553.

The spelling of 2887789 in words is "two million, eight hundred eighty-seven thousand, seven hundred eighty-nine".