679585705 has 8 divisors (see below), whose sum is σ = 815690952. Its totient is φ = 543543168.

The previous prime is 679585703. The next prime is 679585721. The reversal of 679585705 is 507585976.

It can be written as a sum of positive squares in 4 ways, for example, as 5248681 + 674337024 = 2291^2 + 25968^2 .

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 679585705 - 2¹ = 679585703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679585703) 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 7 ways as a sum of consecutive naturals, for example, 12909 + ... + 39061.

It is an arithmetic number, because the mean of its divisors is an integer number (101961369).

Almost surely, 2^679585705 is an apocalyptic number.

It is an amenable number.

679585705 is a deficient number, since it is larger than the sum of its proper divisors (136105247).

679585705 is a wasteful number, since it uses less digits than its factorization.

679585705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31355.

The product of its (nonzero) digits is 2646000, while the sum is 52.

The square root of 679585705 is about 26068.8646664944. The cubic root of 679585705 is about 879.1873114304.

The spelling of 679585705 in words is "six hundred seventy-nine million, five hundred eighty-five thousand, seven hundred five".