671315243 has 2 divisors, whose sum is σ = 671315244. Its totient is φ = 671315242.

The previous prime is 671315213. The next prime is 671315251. The reversal of 671315243 is 342513176.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671315243 - 2¹⁰ = 671314219 is a prime.

It is not a weakly prime, because it can be changed into another prime (671315213) 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, 335657621 + 335657622.

It is an arithmetic number, because the mean of its divisors is an integer number (335657622).

Almost surely, 2^671315243 is an apocalyptic number.

671315243 is a deficient number, since it is larger than the sum of its proper divisors (1).

671315243 is an equidigital number, since it uses as much as digits as its factorization.

671315243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 671315243 is about 25909.7518899738. The cubic root of 671315243 is about 875.6062163132.

The spelling of 671315243 in words is "six hundred seventy-one million, three hundred fifteen thousand, two hundred forty-three".