91000101 has 8 divisors (see below), whose sum is σ = 127719520. Its totient is φ = 57473712.

The previous prime is 91000081. The next prime is 91000163. The reversal of 91000101 is 10100019.

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

It is not a de Polignac number, because 91000101 - 2¹⁵ = 90967333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91000171) 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, 798190 + ... + 798303.

It is an arithmetic number, because the mean of its divisors is an integer number (15964940).

Almost surely, 2^91000101 is an apocalyptic number.

It is an amenable number.

91000101 is a deficient number, since it is larger than the sum of its proper divisors (36719419).

91000101 is a wasteful number, since it uses less digits than its factorization.

91000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596515.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 91000101 is about 9539.3973080064. The cubic root of 91000101 is about 449.7943109348.

The spelling of 91000101 in words is "ninety-one million, one hundred one", and thus it is an aban number.