2684389 has 2 divisors, whose sum is σ = 2684390. Its totient is φ = 2684388.

The previous prime is 2684371. The next prime is 2684401. The reversal of 2684389 is 9834862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1361889 + 1322500 = 1167^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2684389 - 2¹⁹ = 2160101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2684989) 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, 1342194 + 1342195.

It is an arithmetic number, because the mean of its divisors is an integer number (1342195).

2^2684389 is an apocalyptic number.

It is an amenable number.

2684389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2684389 is an equidigital number, since it uses as much as digits as its factorization.

2684389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 40.

The square root of 2684389 is about 1638.4105102202. The cubic root of 2684389 is about 138.9787763258.

The spelling of 2684389 in words is "two million, six hundred eighty-four thousand, three hundred eighty-nine".