91087101 has 12 divisors (see below), whose sum is σ = 150366112. Its totient is φ = 52049736.

The previous prime is 91087063. The next prime is 91087111. The reversal of 91087101 is 10178019.

It is not a de Polignac number, because 91087101 - 2¹⁰ = 91086077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91087111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 722851 + ... + 722976.

Almost surely, 2^91087101 is an apocalyptic number.

It is an amenable number.

91087101 is a deficient number, since it is larger than the sum of its proper divisors (59279011).

91087101 is a wasteful number, since it uses less digits than its factorization.

91087101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445840 (or 1445837 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 91087101 is about 9543.9562551386. The cubic root of 91087101 is about 449.9376061641.

The spelling of 91087101 in words is "ninety-one million, eighty-seven thousand, one hundred one".