9191919101 has 4 divisors (see below), whose sum is σ = 9347714400. Its totient is φ = 9036123804.

The previous prime is 9191919071. The next prime is 9191919103. The reversal of 9191919101 is 1019191919.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1019191919 = 7793 ⋅130783.

It is a cyclic number.

It is not a de Polignac number, because 9191919101 - 2¹⁴ = 9191902717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9191919103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77897561 + ... + 77897678.

It is an arithmetic number, because the mean of its divisors is an integer number (2336928600).

Almost surely, 2^9191919101 is an apocalyptic number.

It is an amenable number.

9191919101 is a deficient number, since it is larger than the sum of its proper divisors (155795299).

9191919101 is a wasteful number, since it uses less digits than its factorization.

9191919101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155795298.

The product of its (nonzero) digits is 6561, while the sum is 41.

The square root of 9191919101 is about 95874.4966140631. The cubic root of 9191919101 is about 2094.7654285548.

The spelling of 9191919101 in words is "nine billion, one hundred ninety-one million, nine hundred nineteen thousand, one hundred one".