613505647 has 2 divisors, whose sum is σ = 613505648. Its totient is φ = 613505646.

The previous prime is 613505597. The next prime is 613505663. The reversal of 613505647 is 746505316.

613505647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 613505647 - 2¹⁵ = 613472879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613505677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306752823 + 306752824.

It is an arithmetic number, because the mean of its divisors is an integer number (306752824).

Almost surely, 2^613505647 is an apocalyptic number.

613505647 is a deficient number, since it is larger than the sum of its proper divisors (1).

613505647 is an equidigital number, since it uses as much as digits as its factorization.

613505647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 613505647 is about 24769.0461463497. The cubic root of 613505647 is about 849.7141585581.

The spelling of 613505647 in words is "six hundred thirteen million, five hundred five thousand, six hundred forty-seven".