2855989 has 2 divisors, whose sum is σ = 2855990. Its totient is φ = 2855988.

The previous prime is 2855953. The next prime is 2856001. The reversal of 2855989 is 9895582.

2855989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2739025 + 116964 = 1655^2 + 342^2 .

It is a cyclic number.

It is not a de Polignac number, because 2855989 - 2¹³ = 2847797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2855089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1427994 + 1427995.

It is an arithmetic number, because the mean of its divisors is an integer number (1427995).

2^2855989 is an apocalyptic number.

It is an amenable number.

2855989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2855989 is an equidigital number, since it uses as much as digits as its factorization.

2855989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 46.

The square root of 2855989 is about 1689.9671594442. The cubic root of 2855989 is about 141.8792367433.

It can be divided in two parts, 2855 and 989, that added together give a square (3844 = 62²).

The spelling of 2855989 in words is "two million, eight hundred fifty-five thousand, nine hundred eighty-nine".