91009101 has 8 divisors (see below), whose sum is σ = 121867200. Its totient is φ = 60411872.

The previous prime is 91009081. The next prime is 91009123. The reversal of 91009101 is 10190019.

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 91009101 - 2¹⁴ = 90992717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91009141) 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 7 ways as a sum of consecutive naturals, for example, 64401 + ... + 65798.

It is an arithmetic number, because the mean of its divisors is an integer number (15233400).

Almost surely, 2^91009101 is an apocalyptic number.

It is an amenable number.

91009101 is a deficient number, since it is larger than the sum of its proper divisors (30858099).

91009101 is a wasteful number, since it uses less digits than its factorization.

91009101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130435.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 91009101 is about 9539.8690242581. The cubic root of 91009101 is about 449.8091388134.

The spelling of 91009101 in words is "ninety-one million, nine thousand, one hundred one".