671039 has 2 divisors, whose sum is σ = 671040. Its totient is φ = 671038.

The previous prime is 671029. The next prime is 671059. The reversal of 671039 is 930176.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671039 - 2¹⁶ = 605503 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 670999 and 671017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671029) 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, 335519 + 335520.

It is an arithmetic number, because the mean of its divisors is an integer number (335520).

2⁶⁷¹⁰³⁹ is an apocalyptic number.

671039 is a deficient number, since it is larger than the sum of its proper divisors (1).

671039 is an equidigital number, since it uses as much as digits as its factorization.

671039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 671039 is about 819.1697015881. The cubic root of 671039 is about 87.5486097251.

The spelling of 671039 in words is "six hundred seventy-one thousand, thirty-nine".