91909101 has 8 divisors (see below), whose sum is σ = 122917024. Its totient is φ = 61086960.

The previous prime is 91909093. The next prime is 91909121. The reversal of 91909101 is 10190919.

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

It is not a de Polignac number, because 91909101 - 2³ = 91909093 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 (91909121) 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, 45286 + ... + 47271.

It is an arithmetic number, because the mean of its divisors is an integer number (15364628).

Almost surely, 2^91909101 is an apocalyptic number.

It is an amenable number.

91909101 is a deficient number, since it is larger than the sum of its proper divisors (31007923).

91909101 is a wasteful number, since it uses less digits than its factorization.

91909101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92891.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 91909101 is about 9586.9234376832. The cubic root of 91909101 is about 451.2870168092.

The spelling of 91909101 in words is "ninety-one million, nine hundred nine thousand, one hundred one".