2489789 has 2 divisors, whose sum is σ = 2489790. Its totient is φ = 2489788.

The previous prime is 2489777. The next prime is 2489797. The reversal of 2489789 is 9879842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2044900 + 444889 = 1430^2 + 667^2 .

It is a cyclic number.

It is not a de Polignac number, because 2489789 - 2⁸ = 2489533 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 (2489719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1244894 + 1244895.

It is an arithmetic number, because the mean of its divisors is an integer number (1244895).

2^2489789 is an apocalyptic number.

It is an amenable number.

2489789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2489789 is an equidigital number, since it uses as much as digits as its factorization.

2489789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 2489789 is about 1577.9065244811. The cubic root of 2489789 is about 135.5358492311.

The spelling of 2489789 in words is "two million, four hundred eighty-nine thousand, seven hundred eighty-nine".