91092009091 has 8 divisors (see below), whose sum is σ = 93034368000. Its totient is φ = 89149826568.

The previous prime is 91092009083. The next prime is 91092009119. The reversal of 91092009091 is 19090029019.

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 91092009091 - 2³ = 91092009083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91092009191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1950880 + ... + 1997026.

It is an arithmetic number, because the mean of its divisors is an integer number (11629296000).

Almost surely, 2^91092009091 is an apocalyptic number.

91092009091 is a deficient number, since it is larger than the sum of its proper divisors (1942358909).

91092009091 is a wasteful number, since it uses less digits than its factorization.

91092009091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88193.

The product of its (nonzero) digits is 13122, while the sum is 40.

The spelling of 91092009091 in words is "ninety-one billion, ninety-two million, nine thousand, ninety-one".