647233 has 4 divisors (see below), whose sum is σ = 648900. Its totient is φ = 645568.

The previous prime is 647219. The next prime is 647261. The reversal of 647233 is 332746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 278784 + 368449 = 528^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 647233 - 2⁵ = 647201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647198 and 647207.

It is not an unprimeable number, because it can be changed into a prime (647263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93 + ... + 1141.

It is an arithmetic number, because the mean of its divisors is an integer number (162225).

2⁶⁴⁷²³³ is an apocalyptic number.

It is an amenable number.

647233 is a deficient number, since it is larger than the sum of its proper divisors (1667).

647233 is a wasteful number, since it uses less digits than its factorization.

647233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666.

The product of its digits is 3024, while the sum is 25.

The square root of 647233 is about 804.5079241375. The cubic root of 647233 is about 86.5008185963.

Adding to 647233 its reverse (332746), we get a palindrome (979979).

The spelling of 647233 in words is "six hundred forty-seven thousand, two hundred thirty-three".