671579 has 4 divisors (see below), whose sum is σ = 680160. Its totient is φ = 663000.

The previous prime is 671557. The next prime is 671581. The reversal of 671579 is 975176.

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

It is a cyclic number.

It is not a de Polignac number, because 671579 - 2⁸ = 671323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671519) 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, 4172 + ... + 4329.

It is an arithmetic number, because the mean of its divisors is an integer number (170040).

2⁶⁷¹⁵⁷⁹ is an apocalyptic number.

671579 is a deficient number, since it is larger than the sum of its proper divisors (8581).

671579 is an equidigital number, since it uses as much as digits as its factorization.

671579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8580.

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

The square root of 671579 is about 819.4992373395. The cubic root of 671579 is about 87.5720875326.

The spelling of 671579 in words is "six hundred seventy-one thousand, five hundred seventy-nine".