671831899 has 2 divisors, whose sum is σ = 671831900. Its totient is φ = 671831898.

The previous prime is 671831873. The next prime is 671831917. The reversal of 671831899 is 998138176.

It is a happy number.

671831899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671831899 is a prime.

It is not a weakly prime, because it can be changed into another prime (671831819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335915949 + 335915950.

It is an arithmetic number, because the mean of its divisors is an integer number (335915950).

Almost surely, 2^671831899 is an apocalyptic number.

671831899 is a deficient number, since it is larger than the sum of its proper divisors (1).

671831899 is an equidigital number, since it uses as much as digits as its factorization.

671831899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 52.

The square root of 671831899 is about 25919.7202724103. The cubic root of 671831899 is about 875.8307860190.

The spelling of 671831899 in words is "six hundred seventy-one million, eight hundred thirty-one thousand, eight hundred ninety-nine".