653603609 has 2 divisors, whose sum is σ = 653603610. Its totient is φ = 653603608.

The previous prime is 653603551. The next prime is 653603611. The reversal of 653603609 is 906306356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 618616384 + 34987225 = 24872^2 + 5915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653603609 is a prime.

Together with 653603611, 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 (653605609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326801804 + 326801805.

It is an arithmetic number, because the mean of its divisors is an integer number (326801805).

Almost surely, 2^653603609 is an apocalyptic number.

It is an amenable number.

653603609 is a deficient number, since it is larger than the sum of its proper divisors (1).

653603609 is an equidigital number, since it uses as much as digits as its factorization.

653603609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 38.

The square root of 653603609 is about 25565.6724730643. The cubic root of 653603609 is about 867.8369699723.

The spelling of 653603609 in words is "six hundred fifty-three million, six hundred three thousand, six hundred nine".