812722436269 has 2 divisors, whose sum is σ = 812722436270. Its totient is φ = 812722436268.

The previous prime is 812722436221. The next prime is 812722436321. The reversal of 812722436269 is 962634227218.

It is an a-pointer prime, because the next prime (812722436321) can be obtained adding 812722436269 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407924916100 + 404797520169 = 638690^2 + 636237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812722436269 is a prime.

It is a super-2 number, since 2×812722436269² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812722436069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406361218134 + 406361218135.

It is an arithmetic number, because the mean of its divisors is an integer number (406361218135).

Almost surely, 2^812722436269 is an apocalyptic number.

It is an amenable number.

812722436269 is a deficient number, since it is larger than the sum of its proper divisors (1).

812722436269 is an equidigital number, since it uses as much as digits as its factorization.

812722436269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 52.

The spelling of 812722436269 in words is "eight hundred twelve billion, seven hundred twenty-two million, four hundred thirty-six thousand, two hundred sixty-nine".