717284745 has 12 divisors (see below), whose sum is σ = 1243293636. Its totient is φ = 382551840.

The previous prime is 717284717. The next prime is 717284749. The reversal of 717284745 is 547482717.

717284745 is a `hidden beast` number, since 7 + 172 + 8 + 474 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 316163961 + 401120784 = 17781^2 + 20028^2 .

It is not a de Polignac number, because 717284745 - 2⁶ = 717284681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 15939661 = 717284745 / (7 + 1 + 7 + 2 + 8 + 4 + 7 + 4 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 717284745.

It is not an unprimeable number, because it can be changed into a prime (717284749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7969786 + ... + 7969875.

It is an arithmetic number, because the mean of its divisors is an integer number (103607803).

Almost surely, 2^717284745 is an apocalyptic number.

It is an amenable number.

717284745 is a deficient number, since it is larger than the sum of its proper divisors (526008891).

717284745 is a wasteful number, since it uses less digits than its factorization.

717284745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15939672 (or 15939669 counting only the distinct ones).

The product of its digits is 439040, while the sum is 45.

The square root of 717284745 is about 26782.1721486514. The cubic root of 717284745 is about 895.1528488571.

The spelling of 717284745 in words is "seven hundred seventeen million, two hundred eighty-four thousand, seven hundred forty-five".