811489 has 6 divisors (see below), whose sum is σ = 944034. Its totient is φ = 695520.

The previous prime is 811469. The next prime is 811493. The reversal of 811489 is 984118.

It can be written as a sum of positive squares in only one way, i.e., 490000 + 321489 = 700^2 + 567^2 .

It is not a de Polignac number, because 811489 - 2⁵ = 811457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 811489.

It is not an unprimeable number, because it can be changed into a prime (811429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8232 + ... + 8329.

It is an arithmetic number, because the mean of its divisors is an integer number (157339).

2⁸¹¹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

811489 is a deficient number, since it is larger than the sum of its proper divisors (132545).

811489 is a wasteful number, since it uses less digits than its factorization.

811489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16575 (or 16568 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 811489 is about 900.8268424065. The cubic root of 811489 is about 93.2740595869.

The spelling of 811489 in words is "eight hundred eleven thousand, four hundred eighty-nine".