83449921117 has 2 divisors, whose sum is σ = 83449921118. Its totient is φ = 83449921116.

The previous prime is 83449921099. The next prime is 83449921141. The reversal of 83449921117 is 71112994438.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50492786436 + 32957134681 = 224706^2 + 181541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83449921117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83449921157) 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, 41724960558 + 41724960559.

It is an arithmetic number, because the mean of its divisors is an integer number (41724960559).

Almost surely, 2^83449921117 is an apocalyptic number.

It is an amenable number.

83449921117 is a deficient number, since it is larger than the sum of its proper divisors (1).

83449921117 is an equidigital number, since it uses as much as digits as its factorization.

83449921117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The spelling of 83449921117 in words is "eighty-three billion, four hundred forty-nine million, nine hundred twenty-one thousand, one hundred seventeen".