9090919169 has 2 divisors, whose sum is σ = 9090919170. Its totient is φ = 9090919168.

The previous prime is 9090919163. The next prime is 9090919177. The reversal of 9090919169 is 9619190909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8721318544 + 369600625 = 93388^2 + 19225^2 .

It is a cyclic number.

It is not a de Polignac number, because 9090919169 - 2³² = 4795951873 is a prime.

It is a super-2 number, since 2×9090919169² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9090919169.

It is not a weakly prime, because it can be changed into another prime (9090919163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545459584 + 4545459585.

It is an arithmetic number, because the mean of its divisors is an integer number (4545459585).

Almost surely, 2^9090919169 is an apocalyptic number.

It is an amenable number.

9090919169 is a deficient number, since it is larger than the sum of its proper divisors (1).

9090919169 is an equidigital number, since it uses as much as digits as its factorization.

9090919169 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 53.

The square root of 9090919169 is about 95346.3117744992. The cubic root of 9090919169 is about 2087.0647936557.

The spelling of 9090919169 in words is "nine billion, ninety million, nine hundred nineteen thousand, one hundred sixty-nine".