11298438209 has 4 divisors (see below), whose sum is σ = 11298896004. Its totient is φ = 11297980416.

The previous prime is 11298438197. The next prime is 11298438233. The reversal of 11298438209 is 90283489211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10180204609 + 1118233600 = 100897^2 + 33440^2 .

It is a cyclic number.

It is not a de Polignac number, because 11298438209 - 2²⁰ = 11297389633 is a prime.

It is a super-2 number, since 2×11298438209² (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 (11298438259) 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, 189632 + ... + 241985.

It is an arithmetic number, because the mean of its divisors is an integer number (2824724001).

Almost surely, 2^11298438209 is an apocalyptic number.

It is an amenable number.

11298438209 is a deficient number, since it is larger than the sum of its proper divisors (457795).

11298438209 is an equidigital number, since it uses as much as digits as its factorization.

11298438209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457794.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 11298438209 in words is "eleven billion, two hundred ninety-eight million, four hundred thirty-eight thousand, two hundred nine".