613538909 has 2 divisors, whose sum is σ = 613538910. Its totient is φ = 613538908.

The previous prime is 613538879. The next prime is 613538951. The reversal of 613538909 is 909835316.

613538909 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., 603439225 + 10099684 = 24565^2 + 3178^2 .

It is a cyclic number.

It is not a de Polignac number, because 613538909 - 2¹² = 613534813 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 613538909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613538999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306769454 + 306769455.

It is an arithmetic number, because the mean of its divisors is an integer number (306769455).

Almost surely, 2^613538909 is an apocalyptic number.

It is an amenable number.

613538909 is a deficient number, since it is larger than the sum of its proper divisors (1).

613538909 is an equidigital number, since it uses as much as digits as its factorization.

613538909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 613538909 is about 24769.7175801421. The cubic root of 613538909 is about 849.7295143970.

The spelling of 613538909 in words is "six hundred thirteen million, five hundred thirty-eight thousand, nine hundred nine".