671838867 has 24 divisors (see below), whose sum is σ = 1150146816. Its totient is φ = 383906952.

The previous prime is 671838779. The next prime is 671838883. The reversal of 671838867 is 768838176.

It is not a de Polignac number, because 671838867 - 2¹¹ = 671836819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671838367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195783 + ... + 199184.

It is an arithmetic number, because the mean of its divisors is an integer number (47922784).

Almost surely, 2^671838867 is an apocalyptic number.

671838867 is a deficient number, since it is larger than the sum of its proper divisors (478307949).

671838867 is an equidigital number, since it uses as much as digits as its factorization.

671838867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394989 (or 394977 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 671838867 is about 25919.8546870927. The cubic root of 671838867 is about 875.8338139430.

The spelling of 671838867 in words is "six hundred seventy-one million, eight hundred thirty-eight thousand, eight hundred sixty-seven".