11198609 has 4 divisors (see below), whose sum is σ = 11333616. Its totient is φ = 11063604.

The previous prime is 11198599. The next prime is 11198687. The reversal of 11198609 is 90689111.

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.

It is a cyclic number.

It is not a de Polignac number, because 11198609 - 2²⁰ = 10150033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11198909) 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, 67379 + ... + 67544.

It is an arithmetic number, because the mean of its divisors is an integer number (2833404).

Almost surely, 2^11198609 is an apocalyptic number.

It is an amenable number.

11198609 is a deficient number, since it is larger than the sum of its proper divisors (135007).

11198609 is an equidigital number, since it uses as much as digits as its factorization.

11198609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135006.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 11198609 is about 3346.4322793088. The cubic root of 11198609 is about 223.7285255547.

The spelling of 11198609 in words is "eleven million, one hundred ninety-eight thousand, six hundred nine".