9100091 has 16 divisors (see below), whose sum is σ = 12219648. Its totient is φ = 6544800.

The previous prime is 9100079. The next prime is 9100099. The reversal of 9100091 is 1900019.

It is a cyclic number.

It is not a de Polignac number, because 9100091 - 2¹⁰ = 9099067 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9100099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3545 + ... + 5546.

It is an arithmetic number, because the mean of its divisors is an integer number (763728).

Almost surely, 2^9100091 is an apocalyptic number.

9100091 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

9100091 is a deficient number, since it is larger than the sum of its proper divisors (3119557).

9100091 is a wasteful number, since it uses less digits than its factorization.

9100091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9122.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 9100091 is about 3016.6357088651. The cubic root of 9100091 is about 208.7766437839.

The spelling of 9100091 in words is "nine million, one hundred thousand, ninety-one".