11191471 has 4 divisors (see below), whose sum is σ = 11326392. Its totient is φ = 11056552.

The previous prime is 11191463. The next prime is 11191489. The reversal of 11191471 is 17419111.

11191471 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17419111 = 29 ⋅600659.

It is a cyclic number.

It is not a de Polignac number, because 11191471 - 2³ = 11191463 is a prime.

It is a super-3 number, since 3×11191471³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11191571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67336 + ... + 67501.

It is an arithmetic number, because the mean of its divisors is an integer number (2831598).

Almost surely, 2^11191471 is an apocalyptic number.

11191471 is a deficient number, since it is larger than the sum of its proper divisors (134921).

11191471 is an equidigital number, since it uses as much as digits as its factorization.

11191471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134920.

The product of its digits is 252, while the sum is 25.

The square root of 11191471 is about 3345.3656003492. The cubic root of 11191471 is about 223.6809805534.

The spelling of 11191471 in words is "eleven million, one hundred ninety-one thousand, four hundred seventy-one".