647365 has 8 divisors (see below), whose sum is σ = 795168. Its totient is φ = 505680.

The previous prime is 647363. The next prime is 647371. The reversal of 647365 is 563746.

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

It is not a de Polignac number, because 647365 - 2¹ = 647363 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 (647363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1291 + ... + 1720.

It is an arithmetic number, because the mean of its divisors is an integer number (99396).

2⁶⁴⁷³⁶⁵ is an apocalyptic number.

It is an amenable number.

647365 is a deficient number, since it is larger than the sum of its proper divisors (147803).

647365 is a wasteful number, since it uses less digits than its factorization.

647365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3059.

The product of its digits is 15120, while the sum is 31.

The square root of 647365 is about 804.5899576803. The cubic root of 647365 is about 86.5066986693.

The spelling of 647365 in words is "six hundred forty-seven thousand, three hundred sixty-five".