720317 has 8 divisors (see below), whose sum is σ = 788256. Its totient is φ = 654192.

The previous prime is 720311. The next prime is 720319. The reversal of 720317 is 713027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 720317 - 2⁴ = 720301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720317.

It is not an unprimeable number, because it can be changed into a prime (720311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458 + ... + 1284.

It is an arithmetic number, because the mean of its divisors is an integer number (98532).

2⁷²⁰³¹⁷ is an apocalyptic number.

It is an amenable number.

720317 is a deficient number, since it is larger than the sum of its proper divisors (67939).

720317 is a wasteful number, since it uses less digits than its factorization.

720317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907.

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 720317 is about 848.7149109094. The cubic root of 720317 is about 89.6412467540.

The spelling of 720317 in words is "seven hundred twenty thousand, three hundred seventeen", and thus it is an iban number.