1100091 has 4 divisors (see below), whose sum is σ = 1466792. Its totient is φ = 733392.

The previous prime is 1100089. The next prime is 1100093. The reversal of 1100091 is 1900011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1900011 = 3 ⋅633337.

It is an interprime number because it is at equal distance from previous prime (1100089) and next prime (1100093).

It is not a de Polignac number, because 1100091 - 2¹ = 1100089 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100093) 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, 183346 + ... + 183351.

It is an arithmetic number, because the mean of its divisors is an integer number (366698).

2^1100091 is an apocalyptic number.

1100091 is a deficient number, since it is larger than the sum of its proper divisors (366701).

1100091 is an equidigital number, since it uses as much as digits as its factorization.

1100091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366700.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 1100091 is about 1048.8522298208. The cubic root of 1100091 is about 103.2308580578.

The spelling of 1100091 in words is "one million, one hundred thousand, ninety-one".