671831873 has 2 divisors, whose sum is σ = 671831874. Its totient is φ = 671831872.

The previous prime is 671831861. The next prime is 671831899. The reversal of 671831873 is 378138176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474934849 + 196897024 = 21793^2 + 14032^2 .

It is a cyclic number.

It is not a de Polignac number, because 671831873 - 2¹⁸ = 671569729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (671831803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335915936 + 335915937.

It is an arithmetic number, because the mean of its divisors is an integer number (335915937).

Almost surely, 2^671831873 is an apocalyptic number.

It is an amenable number.

671831873 is a deficient number, since it is larger than the sum of its proper divisors (1).

671831873 is an equidigital number, since it uses as much as digits as its factorization.

671831873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 671831873 is about 25919.7197708617. The cubic root of 671831873 is about 875.8307747207.

The spelling of 671831873 in words is "six hundred seventy-one million, eight hundred thirty-one thousand, eight hundred seventy-three".