813667 has 4 divisors (see below), whose sum is σ = 835696. Its totient is φ = 791640.

The previous prime is 813647. The next prime is 813677. The reversal of 813667 is 766318.

813667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 813667 - 2¹¹ = 811619 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (813647) 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, 10959 + ... + 11032.

It is an arithmetic number, because the mean of its divisors is an integer number (208924).

2⁸¹³⁶⁶⁷ is an apocalyptic number.

813667 is a deficient number, since it is larger than the sum of its proper divisors (22029).

813667 is a wasteful number, since it uses less digits than its factorization.

813667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22028.

The product of its digits is 6048, while the sum is 31.

The square root of 813667 is about 902.0349217187. The cubic root of 813667 is about 93.3574328357.

The spelling of 813667 in words is "eight hundred thirteen thousand, six hundred sixty-seven".