647039 has 2 divisors, whose sum is σ = 647040. Its totient is φ = 647038.

The previous prime is 647033. The next prime is 647047. The reversal of 647039 is 930746.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647039 is a prime.

It is a Chen prime.

It is equal to p₅₂₅₉₈ and since 647039 and 52598 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323519 + 323520.

It is an arithmetic number, because the mean of its divisors is an integer number (323520).

2⁶⁴⁷⁰³⁹ is an apocalyptic number.

647039 is a deficient number, since it is larger than the sum of its proper divisors (1).

647039 is an equidigital number, since it uses as much as digits as its factorization.

647039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 647039 is about 804.3873445051. The cubic root of 647039 is about 86.4921752197.

The spelling of 647039 in words is "six hundred forty-seven thousand, thirty-nine".