11193005209 has 9 divisors (see below), whose sum is σ = 11441304021. Its totient is φ = 10949989500.

The previous prime is 11193005179. The next prime is 11193005237. The reversal of 11193005209 is 90250039111.

It is a happy number.

The square root of 11193005209 is 105797.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 11193005209 - 2¹⁹ = 11192480921 is a prime.

It is a super-2 number, since 2×11193005209² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11193005609) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4971334 + ... + 4973584.

Almost surely, 2^11193005209 is an apocalyptic number.

11193005209 is the 105797-th square number.

11193005209 is the 52899-th centered octagonal number.

It is an amenable number.

11193005209 is a deficient number, since it is larger than the sum of its proper divisors (248298812).

11193005209 is an frugal number, since it uses more digits than its factorization.

11193005209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4596 (or 2298 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 31.

The spelling of 11193005209 in words is "eleven billion, one hundred ninety-three million, five thousand, two hundred nine".