671420543 has 2 divisors, whose sum is σ = 671420544. Its totient is φ = 671420542.

The previous prime is 671420513. The next prime is 671420597. The reversal of 671420543 is 345024176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671420543 - 2⁶ = 671420479 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671420513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335710271 + 335710272.

It is an arithmetic number, because the mean of its divisors is an integer number (335710272).

Almost surely, 2^671420543 is an apocalyptic number.

671420543 is a deficient number, since it is larger than the sum of its proper divisors (1).

671420543 is an equidigital number, since it uses as much as digits as its factorization.

671420543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 671420543 is about 25911.7838637173. The cubic root of 671420543 is about 875.6519953592.

The spelling of 671420543 in words is "six hundred seventy-one million, four hundred twenty thousand, five hundred forty-three".