813289 has 4 divisors (see below), whose sum is σ = 819280. Its totient is φ = 807300.

The previous prime is 813287. The next prime is 813299. The reversal of 813289 is 982318.

813289 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 982318 = 2 ⋅491159.

It is a cyclic number.

It is not a de Polignac number, because 813289 - 2¹ = 813287 is a prime.

It is a super-2 number, since 2×813289² = 1322877995042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 813289.

It is not an unprimeable number, because it can be changed into a prime (813283) 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, 2787 + ... + 3064.

It is an arithmetic number, because the mean of its divisors is an integer number (204820).

2⁸¹³²⁸⁹ is an apocalyptic number.

It is an amenable number.

813289 is a deficient number, since it is larger than the sum of its proper divisors (5991).

813289 is a wasteful number, since it uses less digits than its factorization.

813289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5990.

The product of its digits is 3456, while the sum is 31.

The square root of 813289 is about 901.8253711224. The cubic root of 813289 is about 93.3429737774.

The spelling of 813289 in words is "eight hundred thirteen thousand, two hundred eighty-nine".