647047 has 2 divisors, whose sum is σ = 647048. Its totient is φ = 647046.

The previous prime is 647039. The next prime is 647057. The reversal of 647047 is 740746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647047 - 2³ = 647039 is a prime.

647047 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323523 + 323524.

It is an arithmetic number, because the mean of its divisors is an integer number (323524).

2⁶⁴⁷⁰⁴⁷ is an apocalyptic number.

647047 is a deficient number, since it is larger than the sum of its proper divisors (1).

647047 is an equidigital number, since it uses as much as digits as its factorization.

647047 is an odious number, because the sum of its binary digits is odd.

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

The square root of 647047 is about 804.3923172184. The cubic root of 647047 is about 86.4925316817.

It can be divided in two parts, 6 and 47047, that multiplied together give a palindrome (282282).

The spelling of 647047 in words is "six hundred forty-seven thousand, forty-seven".