613043309 has 2 divisors, whose sum is σ = 613043310. Its totient is φ = 613043308.

The previous prime is 613043297. The next prime is 613043329. The reversal of 613043309 is 903340316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609349225 + 3694084 = 24685^2 + 1922^2 .

It is a cyclic number.

It is not a de Polignac number, because 613043309 - 2²⁴ = 596266093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613043329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306521654 + 306521655.

It is an arithmetic number, because the mean of its divisors is an integer number (306521655).

Almost surely, 2^613043309 is an apocalyptic number.

It is an amenable number.

613043309 is a deficient number, since it is larger than the sum of its proper divisors (1).

613043309 is an equidigital number, since it uses as much as digits as its factorization.

613043309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 613043309 is about 24759.7114078496. The cubic root of 613043309 is about 849.5006566542.

The spelling of 613043309 in words is "six hundred thirteen million, forty-three thousand, three hundred nine".