671697 has 12 divisors (see below), whose sum is σ = 1045044. Its totient is φ = 413280.

The previous prime is 671681. The next prime is 671701. The reversal of 671697 is 796176.

It can be written as a sum of positive squares in 2 ways, for example, as 207936 + 463761 = 456^2 + 681^2 .

It is not a de Polignac number, because 671697 - 2⁴ = 671681 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 671697.

It is not an unprimeable number, because it can be changed into a prime (671647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2754 + ... + 2987.

It is an arithmetic number, because the mean of its divisors is an integer number (87087).

2⁶⁷¹⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

671697 is a deficient number, since it is larger than the sum of its proper divisors (373347).

671697 is a wasteful number, since it uses less digits than its factorization.

671697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760 (or 5757 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 671697 is about 819.5712293633. The cubic root of 671697 is about 87.5772161927.

It can be divided in two parts, 67169 and 7, that added together give a palindrome (67176).

The spelling of 671697 in words is "six hundred seventy-one thousand, six hundred ninety-seven".