11647091 has 4 divisors (see below), whose sum is σ = 12332232. Its totient is φ = 10961952.

The previous prime is 11647087. The next prime is 11647099. The reversal of 11647091 is 19074611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19074611 = 211 ⋅90401.

It is a cyclic number.

It is not a de Polignac number, because 11647091 - 2² = 11647087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11647099) 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, 342545 + ... + 342578.

It is an arithmetic number, because the mean of its divisors is an integer number (3083058).

Almost surely, 2^11647091 is an apocalyptic number.

11647091 is a deficient number, since it is larger than the sum of its proper divisors (685141).

11647091 is an equidigital number, since it uses as much as digits as its factorization.

11647091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685140.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 11647091 is about 3412.7834680800. The cubic root of 11647091 is about 226.6761474793.

The spelling of 11647091 in words is "eleven million, six hundred forty-seven thousand, ninety-one".