83698568838109 has 2 divisors, whose sum is σ = 83698568838110. Its totient is φ = 83698568838108.

The previous prime is 83698568838091. The next prime is 83698568838163. The reversal of 83698568838109 is 90183886589638.

Together with previous prime (83698568838091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68983074416025 + 14715494422084 = 8305605^2 + 3836078^2 .

It is a cyclic number.

It is not a de Polignac number, because 83698568838109 - 2¹¹ = 83698568836061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83698568838509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41849284419054 + 41849284419055.

It is an arithmetic number, because the mean of its divisors is an integer number (41849284419055).

Almost surely, 2^{83698568838109} is an apocalyptic number.

It is an amenable number.

83698568838109 is a deficient number, since it is larger than the sum of its proper divisors (1).

83698568838109 is an equidigital number, since it uses as much as digits as its factorization.

83698568838109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4299816960, while the sum is 82.

The spelling of 83698568838109 in words is "eighty-three trillion, six hundred ninety-eight billion, five hundred sixty-eight million, eight hundred thirty-eight thousand, one hundred nine".