720955447 has 8 divisors (see below), whose sum is σ = 760756320. Its totient is φ = 681859200.

The previous prime is 720955441. The next prime is 720955451. The reversal of 720955447 is 744559027.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720955447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720955441) 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, 174054 + ... + 178147.

It is an arithmetic number, because the mean of its divisors is an integer number (95094540).

Almost surely, 2^720955447 is an apocalyptic number.

720955447 is a deficient number, since it is larger than the sum of its proper divisors (39800873).

720955447 is a wasteful number, since it uses less digits than its factorization.

720955447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352313.

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 720955447 is about 26850.6135311654. The cubic root of 720955447 is about 896.6772319173.

The spelling of 720955447 in words is "seven hundred twenty million, nine hundred fifty-five thousand, four hundred forty-seven".