671213867 has 2 divisors, whose sum is σ = 671213868. Its totient is φ = 671213866.

The previous prime is 671213857. The next prime is 671213957. The reversal of 671213867 is 768312176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671213867 - 2¹² = 671209771 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (671213857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335606933 + 335606934.

It is an arithmetic number, because the mean of its divisors is an integer number (335606934).

Almost surely, 2^671213867 is an apocalyptic number.

671213867 is a deficient number, since it is larger than the sum of its proper divisors (1).

671213867 is an equidigital number, since it uses as much as digits as its factorization.

671213867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 671213867 is about 25907.7954870730. The cubic root of 671213867 is about 875.5621386983.

The spelling of 671213867 in words is "six hundred seventy-one million, two hundred thirteen thousand, eight hundred sixty-seven".