11191147 has 4 divisors (see below), whose sum is σ = 12208536. Its totient is φ = 10173760.

The previous prime is 11191099. The next prime is 11191153. The reversal of 11191147 is 74119111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11191147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11191157) 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, 508678 + ... + 508699.

It is an arithmetic number, because the mean of its divisors is an integer number (3052134).

Almost surely, 2^11191147 is an apocalyptic number.

11191147 is a deficient number, since it is larger than the sum of its proper divisors (1017389).

11191147 is a wasteful number, since it uses less digits than its factorization.

11191147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017388.

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

The square root of 11191147 is about 3345.3171747982. The cubic root of 11191147 is about 223.6788219650.

The spelling of 11191147 in words is "eleven million, one hundred ninety-one thousand, one hundred forty-seven".