671329 has 4 divisors (see below), whose sum is σ = 675220. Its totient is φ = 667440.

The previous prime is 671323. The next prime is 671339. The reversal of 671329 is 923176.

671329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67600 + 603729 = 260^2 + 777^2 .

It is a cyclic number.

It is not a de Polignac number, because 671329 - 2⁷ = 671201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671297 and 671306.

It is not an unprimeable number, because it can be changed into a prime (671323) 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, 1674 + ... + 2035.

It is an arithmetic number, because the mean of its divisors is an integer number (168805).

2⁶⁷¹³²⁹ is an apocalyptic number.

It is an amenable number.

671329 is a deficient number, since it is larger than the sum of its proper divisors (3891).

671329 is a wasteful number, since it uses less digits than its factorization.

671329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3890.

The product of its digits is 2268, while the sum is 28.

The square root of 671329 is about 819.3466909679. The cubic root of 671329 is about 87.5612197424.

It can be divided in two parts, 671 and 329, that added together give a cube (1000 = 10³).

The spelling of 671329 in words is "six hundred seventy-one thousand, three hundred twenty-nine".