2489909 has 2 divisors, whose sum is σ = 2489910. Its totient is φ = 2489908.

The previous prime is 2489891. The next prime is 2489923. The reversal of 2489909 is 9099842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1697809 + 792100 = 1303^2 + 890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2489909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2489999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1244954 + 1244955.

It is an arithmetic number, because the mean of its divisors is an integer number (1244955).

2^2489909 is an apocalyptic number.

It is an amenable number.

2489909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2489909 is an equidigital number, since it uses as much as digits as its factorization.

2489909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 2489909 is about 1577.9445490891. The cubic root of 2489909 is about 135.5380266633.

The spelling of 2489909 in words is "two million, four hundred eighty-nine thousand, nine hundred nine".