647065 has 8 divisors (see below), whose sum is σ = 783360. Its totient is φ = 513072.

The previous prime is 647057. The next prime is 647069. The reversal of 647065 is 560746.

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 647065 - 2³ = 647057 is a prime.

It is a super-2 number, since 2×647065² = 837386228450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (647069) 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, 126 + ... + 1144.

It is an arithmetic number, because the mean of its divisors is an integer number (97920).

2⁶⁴⁷⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

647065 is a deficient number, since it is larger than the sum of its proper divisors (136295).

647065 is a wasteful number, since it uses less digits than its factorization.

647065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 647065 is about 804.4035057109. The cubic root of 647065 is about 86.4933337106.

The spelling of 647065 in words is "six hundred forty-seven thousand, sixty-five".