11097661 has 4 divisors (see below), whose sum is σ = 11580192. Its totient is φ = 10615132.

The previous prime is 11097649. The next prime is 11097703. The reversal of 11097661 is 16679011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16679011 = 2111 ⋅7901.

It is a cyclic number.

It is not a de Polignac number, because 11097661 - 2⁵ = 11097629 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11097061) 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, 241231 + ... + 241276.

It is an arithmetic number, because the mean of its divisors is an integer number (2895048).

Almost surely, 2^11097661 is an apocalyptic number.

It is an amenable number.

11097661 is a deficient number, since it is larger than the sum of its proper divisors (482531).

11097661 is an equidigital number, since it uses as much as digits as its factorization.

11097661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482530.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 11097661 is about 3331.3152057408. The cubic root of 11097661 is about 223.0542408628.

The spelling of 11097661 in words is "eleven million, ninety-seven thousand, six hundred sixty-one".