545647 has 2 divisors, whose sum is σ = 545648. Its totient is φ = 545646.

The previous prime is 545641. The next prime is 545651. The reversal of 545647 is 746545.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545647 is a prime.

545647 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272823 + 272824.

It is an arithmetic number, because the mean of its divisors is an integer number (272824).

2⁵⁴⁵⁶⁴⁷ is an apocalyptic number.

545647 is a deficient number, since it is larger than the sum of its proper divisors (1).

545647 is an equidigital number, since it uses as much as digits as its factorization.

545647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 31.

The square root of 545647 is about 738.6792267284. The cubic root of 545647 is about 81.7154024436.

The spelling of 545647 in words is "five hundred forty-five thousand, six hundred forty-seven".