2851789 has 2 divisors, whose sum is σ = 2851790. Its totient is φ = 2851788.

The previous prime is 2851787. The next prime is 2851799. The reversal of 2851789 is 9871582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2778889 + 72900 = 1667^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 2851789 - 2¹ = 2851787 is a prime.

Together with 2851787, it forms a pair of twin primes.

2851789 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2851787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1425894 + 1425895.

It is an arithmetic number, because the mean of its divisors is an integer number (1425895).

2^2851789 is an apocalyptic number.

It is an amenable number.

2851789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2851789 is an equidigital number, since it uses as much as digits as its factorization.

2851789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 40.

The square root of 2851789 is about 1688.7240745604. The cubic root of 2851789 is about 141.8096537094.

The spelling of 2851789 in words is "two million, eight hundred fifty-one thousand, seven hundred eighty-nine".