2489813 has 2 divisors, whose sum is σ = 2489814. Its totient is φ = 2489812.

The previous prime is 2489801. The next prime is 2489831. The reversal of 2489813 is 3189842.

It is a happy number.

Together with next prime (2489831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1787569 + 702244 = 1337^2 + 838^2 .

It is a cyclic number.

It is not a de Polignac number, because 2489813 - 2⁴ = 2489797 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2489873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1244906 + 1244907.

It is an arithmetic number, because the mean of its divisors is an integer number (1244907).

2^2489813 is an apocalyptic number.

It is an amenable number.

2489813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2489813 is an equidigital number, since it uses as much as digits as its factorization.

2489813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 2489813 is about 1577.9141294760. The cubic root of 2489813 is about 135.5362847231.

It can be divided in two parts, 24 and 89813, that multiplied together give a palindrome (2155512).

The spelling of 2489813 in words is "two million, four hundred eighty-nine thousand, eight hundred thirteen".