647503 has 2 divisors, whose sum is σ = 647504. Its totient is φ = 647502.

The previous prime is 647489. The next prime is 647509. The reversal of 647503 is 305746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647503 - 2⁹ = 646991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647509) 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, 323751 + 323752.

It is an arithmetic number, because the mean of its divisors is an integer number (323752).

2⁶⁴⁷⁵⁰³ is an apocalyptic number.

647503 is a deficient number, since it is larger than the sum of its proper divisors (1).

647503 is an equidigital number, since it uses as much as digits as its factorization.

647503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 647503 is about 804.6757110787. The cubic root of 647503 is about 86.5128451638.

The spelling of 647503 in words is "six hundred forty-seven thousand, five hundred three".