670543 has 2 divisors, whose sum is σ = 670544. Its totient is φ = 670542.

The previous prime is 670541. The next prime is 670559. The reversal of 670543 is 345076.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 670543 - 2¹ = 670541 is a prime.

Together with 670541, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335271 + 335272.

It is an arithmetic number, because the mean of its divisors is an integer number (335272).

2⁶⁷⁰⁵⁴³ is an apocalyptic number.

670543 is a deficient number, since it is larger than the sum of its proper divisors (1).

670543 is an equidigital number, since it uses as much as digits as its factorization.

670543 is an evil number, because the sum of its binary digits is even.

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

The square root of 670543 is about 818.8669000515. The cubic root of 670543 is about 87.5270338237.

The spelling of 670543 in words is "six hundred seventy thousand, five hundred forty-three".