8208649 has 2 divisors, whose sum is σ = 8208650. Its totient is φ = 8208648.

The previous prime is 8208647. The next prime is 8208667. The reversal of 8208649 is 9468028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7728400 + 480249 = 2780^2 + 693^2 .

It is a cyclic number.

It is not a de Polignac number, because 8208649 - 2¹ = 8208647 is a prime.

Together with 8208647, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 8 + 2²¹ + 0 + 8 + 6⁷ + 4¹⁰ + 9⁷ .

It is not a weakly prime, because it can be changed into another prime (8208647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4104324 + 4104325.

It is an arithmetic number, because the mean of its divisors is an integer number (4104325).

Almost surely, 2^8208649 is an apocalyptic number.

It is an amenable number.

8208649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8208649 is an equidigital number, since it uses as much as digits as its factorization.

8208649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 8208649 is about 2865.0739955540. The cubic root of 8208649 is about 201.7238408420.

The spelling of 8208649 in words is "eight million, two hundred eight thousand, six hundred forty-nine".