671021035873 has 2 divisors, whose sum is σ = 671021035874. Its totient is φ = 671021035872.

The previous prime is 671021035871. The next prime is 671021035903. The reversal of 671021035873 is 378530120176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406236692689 + 264784343184 = 637367^2 + 514572^2 .

It is a cyclic number.

It is not a de Polignac number, because 671021035873 - 2¹ = 671021035871 is a prime.

Together with 671021035871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (671021035871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335510517936 + 335510517937.

It is an arithmetic number, because the mean of its divisors is an integer number (335510517937).

Almost surely, 2^671021035873 is an apocalyptic number.

It is an amenable number.

671021035873 is a deficient number, since it is larger than the sum of its proper divisors (1).

671021035873 is an equidigital number, since it uses as much as digits as its factorization.

671021035873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 671021035873 in words is "six hundred seventy-one billion, twenty-one million, thirty-five thousand, eight hundred seventy-three".