9191919100069 has 2 divisors, whose sum is σ = 9191919100070. Its totient is φ = 9191919100068.

The previous prime is 9191919100033. The next prime is 9191919100093. The reversal of 9191919100069 is 9600019191919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9070788650625 + 121130449444 = 3011775^2 + 348038^2 .

It is a cyclic number.

It is not a de Polignac number, because 9191919100069 - 2²⁵ = 9191885545637 is a prime.

It is a super-2 number, since 2×9191919100069² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9191919099992 and 9191919100019.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9191919100019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4595959550034 + 4595959550035.

It is an arithmetic number, because the mean of its divisors is an integer number (4595959550035).

Almost surely, 2^{9191919100069} is an apocalyptic number.

It is an amenable number.

9191919100069 is a deficient number, since it is larger than the sum of its proper divisors (1).

9191919100069 is an equidigital number, since it uses as much as digits as its factorization.

9191919100069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 354294, while the sum is 55.

The spelling of 9191919100069 in words is "nine trillion, one hundred ninety-one billion, nine hundred nineteen million, one hundred thousand, sixty-nine".