820430269 has 2 divisors, whose sum is σ = 820430270. Its totient is φ = 820430268.

The previous prime is 820430257. The next prime is 820430321. The reversal of 820430269 is 962034028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655616025 + 164814244 = 25605^2 + 12838^2 .

It is a cyclic number.

It is not a de Polignac number, because 820430269 - 2⁷ = 820430141 is a prime.

It is a super-2 number, since 2×820430269² = 1346211652582824722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820430249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410215134 + 410215135.

It is an arithmetic number, because the mean of its divisors is an integer number (410215135).

Almost surely, 2^820430269 is an apocalyptic number.

It is an amenable number.

820430269 is a deficient number, since it is larger than the sum of its proper divisors (1).

820430269 is an equidigital number, since it uses as much as digits as its factorization.

820430269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 820430269 is about 28643.1539639056. The cubic root of 820430269 is about 936.1538440752.

The spelling of 820430269 in words is "eight hundred twenty million, four hundred thirty thousand, two hundred sixty-nine".