730656565 has 4 divisors (see below), whose sum is σ = 876787884. Its totient is φ = 584525248.

The previous prime is 730656551. The next prime is 730656581. The reversal of 730656565 is 565656037.

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 159542161 + 571114404 = 12631^2 + 23898^2 .

It is a cyclic number.

It is not a de Polignac number, because 730656565 - 2⁹ = 730656053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73065652 + ... + 73065661.

It is an arithmetic number, because the mean of its divisors is an integer number (219196971).

Almost surely, 2^730656565 is an apocalyptic number.

It is an amenable number.

730656565 is a deficient number, since it is larger than the sum of its proper divisors (146131319).

730656565 is a wasteful number, since it uses less digits than its factorization.

730656565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146131318.

The product of its (nonzero) digits is 567000, while the sum is 43.

The square root of 730656565 is about 27030.6597218788. The cubic root of 730656565 is about 900.6811982716.

The spelling of 730656565 in words is "seven hundred thirty million, six hundred fifty-six thousand, five hundred sixty-five".