671727 has 16 divisors (see below), whose sum is σ = 1059840. Its totient is φ = 370272.

The previous prime is 671717. The next prime is 671729. The reversal of 671727 is 727176.

It is a happy number.

It is not a de Polignac number, because 671727 - 2⁸ = 671471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 671694 and 671703.

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 671727.

It is not an unprimeable number, because it can be changed into a prime (671729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58 + ... + 1160.

It is an arithmetic number, because the mean of its divisors is an integer number (66240).

2⁶⁷¹⁷²⁷ is an apocalyptic number.

671727 is a deficient number, since it is larger than the sum of its proper divisors (388113).

671727 is a wasteful number, since it uses less digits than its factorization.

671727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142.

The product of its digits is 4116, while the sum is 30.

The square root of 671727 is about 819.5895314119. The cubic root of 671727 is about 87.5785199935.

The spelling of 671727 in words is "six hundred seventy-one thousand, seven hundred twenty-seven".