671338 has 4 divisors (see below), whose sum is σ = 1007010. Its totient is φ = 335668.

The previous prime is 671323. The next prime is 671339. The reversal of 671338 is 833176.

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

It can be written as a sum of positive squares in only one way, i.e., 567009 + 104329 = 753^2 + 323^2 .

It is not an unprimeable number, because it can be changed into a prime (671339) 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 as a sum of consecutive naturals, namely, 167833 + ... + 167836.

2⁶⁷¹³³⁸ is an apocalyptic number.

671338 is a deficient number, since it is larger than the sum of its proper divisors (335672).

671338 is a wasteful number, since it uses less digits than its factorization.

671338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335671.

The product of its digits is 3024, while the sum is 28.

The square root of 671338 is about 819.3521831301. The cubic root of 671338 is about 87.5616110297.

The spelling of 671338 in words is "six hundred seventy-one thousand, three hundred thirty-eight".