671089 has 8 divisors (see below), whose sum is σ = 705960. Its totient is φ = 637056.

The previous prime is 671087. The next prime is 671093. The reversal of 671089 is 980176.

It can be written as a sum of positive squares in 4 ways, for example, as 18225 + 652864 = 135^2 + 808^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671089 - 2¹ = 671087 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 671089.

It is not an unprimeable number, because it can be changed into a prime (671081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1959 + ... + 2275.

It is an arithmetic number, because the mean of its divisors is an integer number (88245).

2⁶⁷¹⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

671089 is a deficient number, since it is larger than the sum of its proper divisors (34871).

671089 is a wasteful number, since it uses less digits than its factorization.

671089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 671089 is about 819.2002197265. The cubic root of 671089 is about 87.5507841251.

It can be divided in two parts, 67 and 1089, that added together give a square (1156 = 34²).

The spelling of 671089 in words is "six hundred seventy-one thousand, eighty-nine".