83800842109 has 2 divisors, whose sum is σ = 83800842110. Its totient is φ = 83800842108.

The previous prime is 83800842107. The next prime is 83800842131. The reversal of 83800842109 is 90124800838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82683277209 + 1117564900 = 287547^2 + 33430^2 .

It is a cyclic number.

It is not a de Polignac number, because 83800842109 - 2¹ = 83800842107 is a prime.

It is a super-2 number, since 2×83800842109² (a number of 23 digits) contains 22 as substring.

Together with 83800842107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83800842107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41900421054 + 41900421055.

It is an arithmetic number, because the mean of its divisors is an integer number (41900421055).

Almost surely, 2^83800842109 is an apocalyptic number.

It is an amenable number.

83800842109 is a deficient number, since it is larger than the sum of its proper divisors (1).

83800842109 is an equidigital number, since it uses as much as digits as its factorization.

83800842109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 83800842109 in words is "eighty-three billion, eight hundred million, eight hundred forty-two thousand, one hundred nine".