2489999 has 2 divisors, whose sum is σ = 2490000. Its totient is φ = 2489998.

The previous prime is 2489947. The next prime is 2490023. The reversal of 2489999 is 9999842.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2489999 - 2²⁰ = 1441423 is a prime.

It is a Sophie Germain prime.

2489999 is a modest number, since divided by 9999 gives 248 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2489909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1244999 + 1245000.

It is an arithmetic number, because the mean of its divisors is an integer number (1245000).

2^2489999 is an apocalyptic number.

2489999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2489999 is an equidigital number, since it uses as much as digits as its factorization.

2489999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 50.

The square root of 2489999 is about 1577.9730669438. The cubic root of 2489999 is about 135.5396596916.

The spelling of 2489999 in words is "two million, four hundred eighty-nine thousand, nine hundred ninety-nine".