671311 has 4 divisors (see below), whose sum is σ = 672952. Its totient is φ = 669672.

The previous prime is 671303. The next prime is 671323. The reversal of 671311 is 113176.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 671311 - 2³ = 671303 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 (671911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361 + ... + 1213.

It is an arithmetic number, because the mean of its divisors is an integer number (168238).

2⁶⁷¹³¹¹ is an apocalyptic number.

671311 is a deficient number, since it is larger than the sum of its proper divisors (1641).

671311 is an equidigital number, since it uses as much as digits as its factorization.

671311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640.

The product of its digits is 126, while the sum is 19.

The square root of 671311 is about 819.3357065330. The cubic root of 671311 is about 87.5604371574.

Adding to 671311 its reverse (113176), we get a palindrome (784487).

It can be divided in two parts, 6713 and 11, that added together give a square (6724 = 82²).

The spelling of 671311 in words is "six hundred seventy-one thousand, three hundred eleven".