4247609 has 2 divisors, whose sum is σ = 4247610. Its totient is φ = 4247608.

The previous prime is 4247597. The next prime is 4247611. The reversal of 4247609 is 9067424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2795584 + 1452025 = 1672^2 + 1205^2 .

It is a cyclic number.

It is not a de Polignac number, because 4247609 - 2²⁰ = 3199033 is a prime.

Together with 4247611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4247629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2123804 + 2123805.

It is an arithmetic number, because the mean of its divisors is an integer number (2123805).

Almost surely, 2^4247609 is an apocalyptic number.

It is an amenable number.

4247609 is a deficient number, since it is larger than the sum of its proper divisors (1).

4247609 is an equidigital number, since it uses as much as digits as its factorization.

4247609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 4247609 is about 2060.9728285448. The cubic root of 4247609 is about 161.9502082409.

The spelling of 4247609 in words is "four million, two hundred forty-seven thousand, six hundred nine".