9190919091 has 16 divisors (see below), whose sum is σ = 12652416000. Its totient is φ = 5928430560.

The previous prime is 9190919081. The next prime is 9190919093. The reversal of 9190919091 is 1909190919.

9190919091 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9190919091 - 2¹³ = 9190910899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9190919091.

It is not an unprimeable number, because it can be changed into a prime (9190919093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 870160 + ... + 880658.

It is an arithmetic number, because the mean of its divisors is an integer number (790776000).

Almost surely, 2^9190919091 is an apocalyptic number.

9190919091 is a deficient number, since it is larger than the sum of its proper divisors (3461496909).

9190919091 is a wasteful number, since it uses less digits than its factorization.

9190919091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19946.

The product of its (nonzero) digits is 59049, while the sum is 48.

The square root of 9190919091 is about 95869.2812688194. The cubic root of 9190919091 is about 2094.6894610184.

The spelling of 9190919091 in words is "nine billion, one hundred ninety million, nine hundred nineteen thousand, ninety-one".