10947809 has 2 divisors, whose sum is σ = 10947810. Its totient is φ = 10947808.

The previous prime is 10947791. The next prime is 10947817. The reversal of 10947809 is 90874901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 1056784 = 3145^2 + 1028^2 .

It is a cyclic number.

It is not a de Polignac number, because 10947809 - 2¹⁶ = 10882273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10947829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5473904 + 5473905.

It is an arithmetic number, because the mean of its divisors is an integer number (5473905).

Almost surely, 2^10947809 is an apocalyptic number.

It is an amenable number.

10947809 is a deficient number, since it is larger than the sum of its proper divisors (1).

10947809 is an equidigital number, since it uses as much as digits as its factorization.

10947809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 10947809 is about 3308.7473460511. The cubic root of 10947809 is about 222.0457187446.

The spelling of 10947809 in words is "ten million, nine hundred forty-seven thousand, eight hundred nine".