11472809 has 2 divisors, whose sum is σ = 11472810. Its totient is φ = 11472808.

The previous prime is 11472803. The next prime is 11472817. The reversal of 11472809 is 90827411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11202409 + 270400 = 3347^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 11472809 - 2⁴ = 11472793 is a prime.

It is not a weakly prime, because it can be changed into another prime (11472803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5736404 + 5736405.

It is an arithmetic number, because the mean of its divisors is an integer number (5736405).

Almost surely, 2^11472809 is an apocalyptic number.

It is an amenable number.

11472809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11472809 is an equidigital number, since it uses as much as digits as its factorization.

11472809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 11472809 is about 3387.1535247166. The cubic root of 11472809 is about 225.5398329838.

The spelling of 11472809 in words is "eleven million, four hundred seventy-two thousand, eight hundred nine".