827169908249 has 2 divisors, whose sum is σ = 827169908250. Its totient is φ = 827169908248.

The previous prime is 827169908231. The next prime is 827169908263. The reversal of 827169908249 is 942809961728.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 825481273600 + 1688634649 = 908560^2 + 41093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-827169908249 is a prime.

It is a super-2 number, since 2×827169908249² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (827169908269) 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, 413584954124 + 413584954125.

It is an arithmetic number, because the mean of its divisors is an integer number (413584954125).

Almost surely, 2^827169908249 is an apocalyptic number.

It is an amenable number.

827169908249 is a deficient number, since it is larger than the sum of its proper divisors (1).

827169908249 is an equidigital number, since it uses as much as digits as its factorization.

827169908249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 65.

The spelling of 827169908249 in words is "eight hundred twenty-seven billion, one hundred sixty-nine million, nine hundred eight thousand, two hundred forty-nine".