100011091 has 2 divisors, whose sum is σ = 100011092. Its totient is φ = 100011090.

The previous prime is 100011089. The next prime is 100011113. The reversal of 100011091 is 190110001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100011091 - 2¹ = 100011089 is a prime.

Together with 100011089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (100011031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50005545 + 50005546.

It is an arithmetic number, because the mean of its divisors is an integer number (50005546).

Almost surely, 2^100011091 is an apocalyptic number.

100011091 is a deficient number, since it is larger than the sum of its proper divisors (1).

100011091 is an equidigital number, since it uses as much as digits as its factorization.

100011091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 100011091 is about 10000.5545346246. The cubic root of 100011091 is about 464.1760426808.

Adding to 100011091 its reverse (190110001), we get a palindrome (290121092).

The spelling of 100011091 in words is "one hundred million, eleven thousand, ninety-one".