647227 has 4 divisors (see below), whose sum is σ = 739696. Its totient is φ = 554760.

The previous prime is 647219. The next prime is 647261. The reversal of 647227 is 722746.

647227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 722746 = 2 ⋅361373.

It is a cyclic number.

It is not a de Polignac number, because 647227 - 2³ = 647219 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 647195 and 647204.

It is not an unprimeable number, because it can be changed into a prime (647327) 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, 46224 + ... + 46237.

It is an arithmetic number, because the mean of its divisors is an integer number (184924).

2⁶⁴⁷²²⁷ is an apocalyptic number.

647227 is a deficient number, since it is larger than the sum of its proper divisors (92469).

647227 is an equidigital number, since it uses as much as digits as its factorization.

647227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92468.

The product of its digits is 4704, while the sum is 28.

The square root of 647227 is about 804.5041951413. The cubic root of 647227 is about 86.5005513012.

The spelling of 647227 in words is "six hundred forty-seven thousand, two hundred twenty-seven".