814789 has 2 divisors, whose sum is σ = 814790. Its totient is φ = 814788.

The previous prime is 814783. The next prime is 814799. The reversal of 814789 is 987418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 748225 + 66564 = 865^2 + 258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-814789 is a prime.

It is a super-2 number, since 2×814789² = 1327762229042, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

814789 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (814783) 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 as a sum of consecutive naturals, namely, 407394 + 407395.

It is an arithmetic number, because the mean of its divisors is an integer number (407395).

2⁸¹⁴⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

814789 is a deficient number, since it is larger than the sum of its proper divisors (1).

814789 is an equidigital number, since it uses as much as digits as its factorization.

814789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 37.

The square root of 814789 is about 902.6566346070. The cubic root of 814789 is about 93.4003246370.

It can be divided in two parts, 814 and 789, that multiplied together give a palindrome (642246).

The spelling of 814789 in words is "eight hundred fourteen thousand, seven hundred eighty-nine".