613750565 has 4 divisors (see below), whose sum is σ = 736500684. Its totient is φ = 491000448.

The previous prime is 613750549. The next prime is 613750591. The reversal of 613750565 is 565057316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77457601 + 536292964 = 8801^2 + 23158^2 .

It is a cyclic number.

It is not a de Polignac number, because 613750565 - 2⁴ = 613750549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 61375052 + ... + 61375061.

It is an arithmetic number, because the mean of its divisors is an integer number (184125171).

Almost surely, 2^613750565 is an apocalyptic number.

It is an amenable number.

613750565 is a deficient number, since it is larger than the sum of its proper divisors (122750119).

613750565 is a wasteful number, since it uses less digits than its factorization.

613750565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122750118.

The product of its (nonzero) digits is 94500, while the sum is 38.

The square root of 613750565 is about 24773.9896867662. The cubic root of 613750565 is about 849.8272151677.

The spelling of 613750565 in words is "six hundred thirteen million, seven hundred fifty thousand, five hundred sixty-five".