99843911683709 has 2 divisors, whose sum is σ = 99843911683710. Its totient is φ = 99843911683708.

The previous prime is 99843911683697. The next prime is 99843911683739. The reversal of 99843911683709 is 90738611934899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98553211195609 + 1290700488100 = 9927397^2 + 1136090^2 .

It is a cyclic number.

It is not a de Polignac number, because 99843911683709 - 2⁴ = 99843911683693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 99843911683709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99843911683739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49921955841854 + 49921955841855.

It is an arithmetic number, because the mean of its divisors is an integer number (49921955841855).

Almost surely, 2^{99843911683709} is an apocalyptic number.

It is an amenable number.

99843911683709 is a deficient number, since it is larger than the sum of its proper divisors (1).

99843911683709 is an equidigital number, since it uses as much as digits as its factorization.

99843911683709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 634894848, while the sum is 77.

The spelling of 99843911683709 in words is "ninety-nine trillion, eight hundred forty-three billion, nine hundred eleven million, six hundred eighty-three thousand, seven hundred nine".