8406649 has 2 divisors, whose sum is σ = 8406650. Its totient is φ = 8406648.

The previous prime is 8406637. The next prime is 8406667. The reversal of 8406649 is 9466048.

8406649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4545424 + 3861225 = 2132^2 + 1965^2 .

It is a cyclic number.

It is not a de Polignac number, because 8406649 - 2¹⁷ = 8275577 is a prime.

It is not a weakly prime, because it can be changed into another prime (8406689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4203324 + 4203325.

It is an arithmetic number, because the mean of its divisors is an integer number (4203325).

Almost surely, 2^8406649 is an apocalyptic number.

It is an amenable number.

8406649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8406649 is an equidigital number, since it uses as much as digits as its factorization.

8406649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 8406649 is about 2899.4221838153. The cubic root of 8406649 is about 203.3328922920.

The spelling of 8406649 in words is "eight million, four hundred six thousand, six hundred forty-nine".