100911091 has 4 divisors (see below), whose sum is σ = 100931184. Its totient is φ = 100891000.

The previous prime is 100911089. The next prime is 100911101. The reversal of 100911091 is 190119001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190119001 = 31 ⋅6132871.

It is a cyclic number.

It is not a de Polignac number, because 100911091 - 2¹ = 100911089 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (100911011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4866 + ... + 15016.

It is an arithmetic number, because the mean of its divisors is an integer number (25232796).

Almost surely, 2^100911091 is an apocalyptic number.

100911091 is a deficient number, since it is larger than the sum of its proper divisors (20093).

100911091 is an equidigital number, since it uses as much as digits as its factorization.

100911091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20092.

The product of its (nonzero) digits is 81, while the sum is 22.

The square root of 100911091 is about 10045.4512591521. The cubic root of 100911091 is about 465.5642604794.

It can be divided in two parts, 1009 and 11091, that added together give a square (12100 = 110²).

The spelling of 100911091 in words is "one hundred million, nine hundred eleven thousand, ninety-one".