11440091 has 4 divisors (see below), whose sum is σ = 12320112. Its totient is φ = 10560072.

The previous prime is 11440073. The next prime is 11440097. The reversal of 11440091 is 19004411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19004411 = 661 ⋅28751.

It is a cyclic number.

It is not a de Polignac number, because 11440091 - 2⁶ = 11440027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11440097) 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, 439991 + ... + 440016.

It is an arithmetic number, because the mean of its divisors is an integer number (3080028).

Almost surely, 2^11440091 is an apocalyptic number.

11440091 is a deficient number, since it is larger than the sum of its proper divisors (880021).

11440091 is an equidigital number, since it uses as much as digits as its factorization.

11440091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880020.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 11440091 is about 3382.3203573878. The cubic root of 11440091 is about 225.3252317170.

The spelling of 11440091 in words is "eleven million, four hundred forty thousand, ninety-one".