2406689 has 2 divisors, whose sum is σ = 2406690. Its totient is φ = 2406688.

The previous prime is 2406683. The next prime is 2406709. The reversal of 2406689 is 9866042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2226064 + 180625 = 1492^2 + 425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2406689 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2²¹ + 4⁹ + 0 + 6³ + 6⁶ + 8³ + 9 .

It is not a weakly prime, because it can be changed into another prime (2406683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1203344 + 1203345.

It is an arithmetic number, because the mean of its divisors is an integer number (1203345).

2^2406689 is an apocalyptic number.

It is an amenable number.

2406689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2406689 is an equidigital number, since it uses as much as digits as its factorization.

2406689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 2406689 is about 1551.3507018079. The cubic root of 2406689 is about 134.0108589997.

The spelling of 2406689 in words is "two million, four hundred six thousand, six hundred eighty-nine".