647723585 has 16 divisors (see below), whose sum is σ = 853752960. Its totient is φ = 469560960.

The previous prime is 647723569. The next prime is 647723597. The reversal of 647723585 is 585327746.

647723585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 647723585 - 2⁴ = 647723569 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146036 + ... + 150405.

It is an arithmetic number, because the mean of its divisors is an integer number (53359560).

Almost surely, 2^647723585 is an apocalyptic number.

It is an amenable number.

647723585 is a deficient number, since it is larger than the sum of its proper divisors (206029375).

647723585 is a wasteful number, since it uses less digits than its factorization.

647723585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296488.

The product of its digits is 1411200, while the sum is 47.

The square root of 647723585 is about 25450.4142402437. The cubic root of 647723585 is about 865.2266816556.

The spelling of 647723585 in words is "six hundred forty-seven million, seven hundred twenty-three thousand, five hundred eighty-five".