616235509 has 2 divisors, whose sum is σ = 616235510. Its totient is φ = 616235508.

The previous prime is 616235489. The next prime is 616235551. The reversal of 616235509 is 905532616.

616235509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558140625 + 58094884 = 23625^2 + 7622^2 .

It is a cyclic number.

It is not a de Polignac number, because 616235509 - 2¹⁹ = 615711221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616235579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308117754 + 308117755.

It is an arithmetic number, because the mean of its divisors is an integer number (308117755).

Almost surely, 2^616235509 is an apocalyptic number.

It is an amenable number.

616235509 is a deficient number, since it is larger than the sum of its proper divisors (1).

616235509 is an equidigital number, since it uses as much as digits as its factorization.

616235509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 616235509 is about 24824.0913026036. The cubic root of 616235509 is about 850.9725932821.

The spelling of 616235509 in words is "six hundred sixteen million, two hundred thirty-five thousand, five hundred nine".