9101920091 has 16 divisors (see below), whose sum is σ = 10209217536. Its totient is φ = 8042760000.

The previous prime is 9101920081. The next prime is 9101920103. The reversal of 9101920091 is 1900291019.

It is not a de Polignac number, because 9101920091 - 2⁶ = 9101920027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9101920001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84986 + ... + 159456.

It is an arithmetic number, because the mean of its divisors is an integer number (638076096).

Almost surely, 2^9101920091 is an apocalyptic number.

9101920091 is a deficient number, since it is larger than the sum of its proper divisors (1107297445).

9101920091 is a wasteful number, since it uses less digits than its factorization.

9101920091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74794.

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

The square root of 9101920091 is about 95403.9836222786. The cubic root of 9101920091 is about 2087.9063067321.

The spelling of 9101920091 in words is "nine billion, one hundred one million, nine hundred twenty thousand, ninety-one".