4909609 has 2 divisors, whose sum is σ = 4909610. Its totient is φ = 4909608.

The previous prime is 4909601. The next prime is 4909637. The reversal of 4909609 is 9069094.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3988009 + 921600 = 1997^2 + 960^2 .

It is a cyclic number.

It is not a de Polignac number, because 4909609 - 2³ = 4909601 is a prime.

It is not a weakly prime, because it can be changed into another prime (4909601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2454804 + 2454805.

It is an arithmetic number, because the mean of its divisors is an integer number (2454805).

Almost surely, 2^4909609 is an apocalyptic number.

It is an amenable number.

4909609 is a deficient number, since it is larger than the sum of its proper divisors (1).

4909609 is an equidigital number, since it uses as much as digits as its factorization.

4909609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 4909609 is about 2215.7637509446. The cubic root of 4909609 is about 169.9608791180.

The spelling of 4909609 in words is "four million, nine hundred nine thousand, six hundred nine".