671189889 has 4 divisors (see below), whose sum is σ = 894919856. Its totient is φ = 447459924.

The previous prime is 671189873. The next prime is 671189917. The reversal of 671189889 is 988981176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 671189889 - 2⁴ = 671189873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671189809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111864979 + ... + 111864984.

It is an arithmetic number, because the mean of its divisors is an integer number (223729964).

Almost surely, 2^671189889 is an apocalyptic number.

It is an amenable number.

671189889 is a deficient number, since it is larger than the sum of its proper divisors (223729967).

671189889 is a wasteful number, since it uses less digits than its factorization.

671189889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223729966.

The product of its digits is 1741824, while the sum is 57.

The square root of 671189889 is about 25907.3327264695. The cubic root of 671189889 is about 875.5517125733.

The spelling of 671189889 in words is "six hundred seventy-one million, one hundred eighty-nine thousand, eight hundred eighty-nine".