813671 has 8 divisors (see below), whose sum is σ = 899424. Its totient is φ = 732160.

The previous prime is 813647. The next prime is 813677. The reversal of 813671 is 176318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 10-Lehmer number, since φ(813671) divides (813671-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 813671 - 2¹⁴ = 797287 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 813671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650 + ... + 1431.

It is an arithmetic number, because the mean of its divisors is an integer number (112428).

2⁸¹³⁶⁷¹ is an apocalyptic number.

813671 is a deficient number, since it is larger than the sum of its proper divisors (85753).

813671 is a wasteful number, since it uses less digits than its factorization.

813671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121.

The product of its digits is 1008, while the sum is 26.

The square root of 813671 is about 902.0371389250. The cubic root of 813671 is about 93.3575858177.

Adding to 813671 its reverse (176318), we get a palindrome (989989).

The spelling of 813671 in words is "eight hundred thirteen thousand, six hundred seventy-one".