819268069 has 2 divisors, whose sum is σ = 819268070. Its totient is φ = 819268068.

The previous prime is 819268039. The next prime is 819268129. The reversal of 819268069 is 960862918.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 733705569 + 85562500 = 27087^2 + 9250^2 .

It is a cyclic number.

It is not a de Polignac number, because 819268069 - 2¹⁹ = 818743781 is a prime.

It is a super-2 number, since 2×819268069² = 1342400337765977522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (819268019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409634034 + 409634035.

It is an arithmetic number, because the mean of its divisors is an integer number (409634035).

Almost surely, 2^819268069 is an apocalyptic number.

It is an amenable number.

819268069 is a deficient number, since it is larger than the sum of its proper divisors (1).

819268069 is an equidigital number, since it uses as much as digits as its factorization.

819268069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 819268069 is about 28622.8592037902. The cubic root of 819268069 is about 935.7115915212.

The spelling of 819268069 in words is "eight hundred nineteen million, two hundred sixty-eight thousand, sixty-nine".