2489881 has 2 divisors, whose sum is σ = 2489882. Its totient is φ = 2489880.

The previous prime is 2489873. The next prime is 2489891. The reversal of 2489881 is 1889842.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1299600 + 1190281 = 1140^2 + 1091^2 .

It is a cyclic number.

It is not a de Polignac number, because 2489881 - 2³ = 2489873 is a prime.

It is a super-2 number, since 2×2489881² = 12399014788322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2489801) 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, 1244940 + 1244941.

It is an arithmetic number, because the mean of its divisors is an integer number (1244941).

2^2489881 is an apocalyptic number.

It is an amenable number.

2489881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2489881 is an equidigital number, since it uses as much as digits as its factorization.

2489881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 40.

The square root of 2489881 is about 1577.9356767625. The cubic root of 2489881 is about 135.5375186020.

The spelling of 2489881 in words is "two million, four hundred eighty-nine thousand, eight hundred eighty-one".