9191920001 has 12 divisors (see below), whose sum is σ = 10132678416. Its totient is φ = 8332171320.

The previous prime is 9191919967. The next prime is 9191920013. The reversal of 9191920001 is 1000291919.

It is not a de Polignac number, because 9191920001 - 2⁶ = 9191919937 is a prime.

It is a Duffinian number.

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 9191920001.

It is not an unprimeable number, because it can be changed into a prime (9191920051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67475 + ... + 151448.

It is an arithmetic number, because the mean of its divisors is an integer number (844389868).

Almost surely, 2^9191920001 is an apocalyptic number.

It is an amenable number.

9191920001 is a deficient number, since it is larger than the sum of its proper divisors (940758415).

9191920001 is a wasteful number, since it uses less digits than its factorization.

9191920001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219292 (or 219281 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 9191920001 is about 95874.5013076991. The cubic root of 9191920001 is about 2094.7654969224.

The spelling of 9191920001 in words is "nine billion, one hundred ninety-one million, nine hundred twenty thousand, one".