671043047 has 2 divisors, whose sum is σ = 671043048. Its totient is φ = 671043046.

The previous prime is 671042987. The next prime is 671043053. The reversal of 671043047 is 740340176.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671043047 - 2¹⁶ = 670977511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671043067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335521523 + 335521524.

It is an arithmetic number, because the mean of its divisors is an integer number (335521524).

Almost surely, 2^671043047 is an apocalyptic number.

671043047 is a deficient number, since it is larger than the sum of its proper divisors (1).

671043047 is an equidigital number, since it uses as much as digits as its factorization.

671043047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 671043047 is about 25904.4985861529. The cubic root of 671043047 is about 875.4878572502.

The spelling of 671043047 in words is "six hundred seventy-one million, forty-three thousand, forty-seven".