819229 has 2 divisors, whose sum is σ = 819230. Its totient is φ = 819228.

The previous prime is 819187. The next prime is 819239. The reversal of 819229 is 922918.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 813604 + 5625 = 902^2 + 75^2 .

It is a cyclic number.

It is not a de Polignac number, because 819229 - 2⁷ = 819101 is a prime.

It is a super-2 number, since 2×819229² = 1342272308882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 819229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (819239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409614 + 409615.

It is an arithmetic number, because the mean of its divisors is an integer number (409615).

2⁸¹⁹²²⁹ is an apocalyptic number.

It is an amenable number.

819229 is a deficient number, since it is larger than the sum of its proper divisors (1).

819229 is an equidigital number, since it uses as much as digits as its factorization.

819229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

The square root of 819229 is about 905.1127001650. The cubic root of 819229 is about 93.5696717311.

The spelling of 819229 in words is "eight hundred nineteen thousand, two hundred twenty-nine".