647347 has 4 divisors (see below), whose sum is σ = 650800. Its totient is φ = 643896.

The previous prime is 647341. The next prime is 647357. The reversal of 647347 is 743746.

647347 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: 743746 = 2 ⋅371873.

It is a cyclic number.

It is not a de Polignac number, because 647347 - 2⁷ = 647219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647341) 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, 1428 + ... + 1825.

It is an arithmetic number, because the mean of its divisors is an integer number (162700).

2⁶⁴⁷³⁴⁷ is an apocalyptic number.

647347 is a deficient number, since it is larger than the sum of its proper divisors (3453).

647347 is a wasteful number, since it uses less digits than its factorization.

647347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452.

The product of its digits is 14112, while the sum is 31.

The square root of 647347 is about 804.5787717806. The cubic root of 647347 is about 86.5058968882.

The spelling of 647347 in words is "six hundred forty-seven thousand, three hundred forty-seven".