671397 has 8 divisors (see below), whose sum is σ = 901344. Its totient is φ = 444528.

The previous prime is 671383. The next prime is 671401. The reversal of 671397 is 793176.

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

It is not a de Polignac number, because 671397 - 2⁷ = 671269 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 671397.

It is not an unprimeable number, because it can be changed into a prime (671357) 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, 198 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (112668).

2⁶⁷¹³⁹⁷ is an apocalyptic number.

It is an amenable number.

671397 is a deficient number, since it is larger than the sum of its proper divisors (229947).

671397 is a wasteful number, since it uses less digits than its factorization.

671397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539.

The product of its digits is 7938, while the sum is 33.

The square root of 671397 is about 819.3881863927. The cubic root of 671397 is about 87.5641760484.

The spelling of 671397 in words is "six hundred seventy-one thousand, three hundred ninety-seven".