11279209 has 2 divisors, whose sum is σ = 11279210. Its totient is φ = 11279208.

The previous prime is 11279197. The next prime is 11279243. The reversal of 11279209 is 90297211.

11279209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8573184 + 2706025 = 2928^2 + 1645^2 .

It is a cyclic number.

It is not a de Polignac number, because 11279209 - 2⁹ = 11278697 is a prime.

It is not a weakly prime, because it can be changed into another prime (11279299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5639604 + 5639605.

It is an arithmetic number, because the mean of its divisors is an integer number (5639605).

Almost surely, 2^11279209 is an apocalyptic number.

It is an amenable number.

11279209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11279209 is an equidigital number, since it uses as much as digits as its factorization.

11279209 is an evil number, because the sum of its binary digits is even.

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

The square root of 11279209 is about 3358.4533642735. The cubic root of 11279209 is about 224.2639917412.

The spelling of 11279209 in words is "eleven million, two hundred seventy-nine thousand, two hundred nine".