670541 has 2 divisors, whose sum is σ = 670542. Its totient is φ = 670540.

The previous prime is 670517. The next prime is 670543. The reversal of 670541 is 145076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 532900 + 137641 = 730^2 + 371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670541 is a prime.

Together with 670543, it forms a pair of twin primes.

It is a Chen prime.

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 (670543) 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, 335270 + 335271.

It is an arithmetic number, because the mean of its divisors is an integer number (335271).

2⁶⁷⁰⁵⁴¹ is an apocalyptic number.

It is an amenable number.

670541 is a deficient number, since it is larger than the sum of its proper divisors (1).

670541 is an equidigital number, since it uses as much as digits as its factorization.

670541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 670541 is about 818.8656788509. The cubic root of 670541 is about 87.5269468026.

The spelling of 670541 in words is "six hundred seventy thousand, five hundred forty-one".