647716 has 12 divisors (see below), whose sum is σ = 1144332. Its totient is φ = 320768.

The previous prime is 647693. The next prime is 647719. The reversal of 647716 is 617746.

It can be written as a sum of positive squares in 2 ways, for example, as 230400 + 417316 = 480^2 + 646^2 .

It is not an unprimeable number, because it can be changed into a prime (647719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265 + ... + 1168.

It is an arithmetic number, because the mean of its divisors is an integer number (95361).

2⁶⁴⁷⁷¹⁶ is an apocalyptic number.

It is an amenable number.

647716 is a deficient number, since it is larger than the sum of its proper divisors (496616).

647716 is a wasteful number, since it uses less digits than its factorization.

647716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550 (or 1548 counting only the distinct ones).

The product of its digits is 7056, while the sum is 31.

The square root of 647716 is about 804.8080516496. The cubic root of 647716 is about 86.5223304304.

The spelling of 647716 in words is "six hundred forty-seven thousand, seven hundred sixteen".