91909101101 has 8 divisors (see below), whose sum is σ = 92756499000. Its totient is φ = 91062300672.

The previous prime is 91909101077. The next prime is 91909101139. The reversal of 91909101101 is 10110190919.

It can be written as a sum of positive squares in 4 ways, for example, as 3074702500 + 88834398601 = 55450^2 + 298051^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91909101101 - 2³⁴ = 74729231917 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 (91909101301) 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 7 ways as a sum of consecutive naturals, for example, 162701 + ... + 458573.

It is an arithmetic number, because the mean of its divisors is an integer number (11594562375).

Almost surely, 2^91909101101 is an apocalyptic number.

It is an amenable number.

91909101101 is a deficient number, since it is larger than the sum of its proper divisors (847397899).

91909101101 is a wasteful number, since it uses less digits than its factorization.

91909101101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298735.

The product of its (nonzero) digits is 729, while the sum is 32.

The spelling of 91909101101 in words is "ninety-one billion, nine hundred nine million, one hundred one thousand, one hundred one".