647000 has 32 divisors (see below), whose sum is σ = 1516320. Its totient is φ = 258400.

The previous prime is 646993. The next prime is 647011. The reversal of 647000 is 746.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 647000.

It is a congruent number.

It is an unprimeable number.

647000 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677 + ... + 1323.

It is an arithmetic number, because the mean of its divisors is an integer number (47385).

2⁶⁴⁷⁰⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758160).

647000 is an abundant number, since it is smaller than the sum of its proper divisors (869320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647000 is a wasteful number, since it uses less digits than its factorization.

647000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 647000 is about 804.3631020876. The cubic root of 647000 is about 86.4904374251.

Adding to 647000 its reverse (746), we get a palindrome (647746).

The spelling of 647000 in words is "six hundred forty-seven thousand".