2499689 has 2 divisors, whose sum is σ = 2499690. Its totient is φ = 2499688.

The previous prime is 2499671. The next prime is 2499727. The reversal of 2499689 is 9869942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2274064 + 225625 = 1508^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 2499689 - 2¹⁶ = 2434153 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (2499619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249844 + 1249845.

It is an arithmetic number, because the mean of its divisors is an integer number (1249845).

2^2499689 is an apocalyptic number.

It is an amenable number.

2499689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2499689 is an equidigital number, since it uses as much as digits as its factorization.

2499689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 47.

The square root of 2499689 is about 1581.0404801902. The cubic root of 2499689 is about 135.7152527038.

The spelling of 2499689 in words is "two million, four hundred ninety-nine thousand, six hundred eighty-nine".