720583345 has 4 divisors (see below), whose sum is σ = 864700020. Its totient is φ = 576466672.

The previous prime is 720583247. The next prime is 720583349. The reversal of 720583345 is 543385027.

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 448465329 + 272118016 = 21177^2 + 16496^2 .

It is a cyclic number.

It is not a de Polignac number, because 720583345 - 2¹¹ = 720581297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (720583349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72058330 + ... + 72058339.

It is an arithmetic number, because the mean of its divisors is an integer number (216175005).

Almost surely, 2^720583345 is an apocalyptic number.

It is an amenable number.

720583345 is a deficient number, since it is larger than the sum of its proper divisors (144116675).

720583345 is a wasteful number, since it uses less digits than its factorization.

720583345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144116674.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 720583345 is about 26843.6835214544. The cubic root of 720583345 is about 896.5229399928.

The spelling of 720583345 in words is "seven hundred twenty million, five hundred eighty-three thousand, three hundred forty-five".