671597 has 4 divisors (see below), whose sum is σ = 683040. Its totient is φ = 660156.

The previous prime is 671591. The next prime is 671603. The reversal of 671597 is 795176.

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 an interprime number because it is at equal distance from previous prime (671591) and next prime (671603).

It is a cyclic number.

It is not a de Polignac number, because 671597 - 2⁴ = 671581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5633 + ... + 5750.

It is an arithmetic number, because the mean of its divisors is an integer number (170760).

2⁶⁷¹⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

671597 is a deficient number, since it is larger than the sum of its proper divisors (11443).

671597 is a wasteful number, since it uses less digits than its factorization.

671597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11442.

The product of its digits is 13230, while the sum is 35.

The square root of 671597 is about 819.5102195824. The cubic root of 671597 is about 87.5728699094.

The spelling of 671597 in words is "six hundred seventy-one thousand, five hundred ninety-seven".