717479321 has 8 divisors (see below), whose sum is σ = 793553544. Its totient is φ = 644388480.

The previous prime is 717479317. The next prime is 717479359. The reversal of 717479321 is 123974717.

It can be written as a sum of positive squares in 4 ways, for example, as 262083721 + 455395600 = 16189^2 + 21340^2 .

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 717479321 - 2² = 717479317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (717479821) 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 7 ways as a sum of consecutive naturals, for example, 745340 + ... + 746301.

It is an arithmetic number, because the mean of its divisors is an integer number (99194193).

Almost surely, 2^717479321 is an apocalyptic number.

It is an amenable number.

717479321 is a deficient number, since it is larger than the sum of its proper divisors (76074223).

717479321 is a wasteful number, since it uses less digits than its factorization.

717479321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491691.

The product of its digits is 74088, while the sum is 41.

The square root of 717479321 is about 26785.8044680387. The cubic root of 717479321 is about 895.2337834813.

The spelling of 717479321 in words is "seven hundred seventeen million, four hundred seventy-nine thousand, three hundred twenty-one".