4649209 has 2 divisors, whose sum is σ = 4649210. Its totient is φ = 4649208.

The previous prime is 4649207. The next prime is 4649219. The reversal of 4649209 is 9029464.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4644025 + 5184 = 2155^2 + 72^2 .

It is a cyclic number.

It is not a de Polignac number, because 4649209 - 2¹ = 4649207 is a prime.

Together with 4649207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4649201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2324604 + 2324605.

It is an arithmetic number, because the mean of its divisors is an integer number (2324605).

Almost surely, 2^4649209 is an apocalyptic number.

It is an amenable number.

4649209 is a deficient number, since it is larger than the sum of its proper divisors (1).

4649209 is an equidigital number, since it uses as much as digits as its factorization.

4649209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 4649209 is about 2156.2024487510. The cubic root of 4649209 is about 166.9012886712.

The spelling of 4649209 in words is "four million, six hundred forty-nine thousand, two hundred nine".