4399609 has 2 divisors, whose sum is σ = 4399610. Its totient is φ = 4399608.

The previous prime is 4399573. The next prime is 4399627. The reversal of 4399609 is 9069934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3841600 + 558009 = 1960^2 + 747^2 .

It is a cyclic number.

It is not a de Polignac number, because 4399609 - 2¹³ = 4391417 is a prime.

It is not a weakly prime, because it can be changed into another prime (4399639) 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, 2199804 + 2199805.

It is an arithmetic number, because the mean of its divisors is an integer number (2199805).

Almost surely, 2^4399609 is an apocalyptic number.

It is an amenable number.

4399609 is a deficient number, since it is larger than the sum of its proper divisors (1).

4399609 is an equidigital number, since it uses as much as digits as its factorization.

4399609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 4399609 is about 2097.5244933016. The cubic root of 4399609 is about 163.8594001185.

The spelling of 4399609 in words is "four million, three hundred ninety-nine thousand, six hundred nine".