11680447 has 4 divisors (see below), whose sum is σ = 11688256. Its totient is φ = 11672640.

The previous prime is 11680379. The next prime is 11680457. The reversal of 11680447 is 74408611.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11680447 - 2¹⁵ = 11647679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11680457) 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, 879 + ... + 4912.

It is an arithmetic number, because the mean of its divisors is an integer number (2922064).

Almost surely, 2^11680447 is an apocalyptic number.

11680447 is a deficient number, since it is larger than the sum of its proper divisors (7809).

11680447 is an equidigital number, since it uses as much as digits as its factorization.

11680447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7808.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 11680447 is about 3417.6668942423. Note that the first 3 decimals coincide. The cubic root of 11680447 is about 226.8923331651.

The spelling of 11680447 in words is "eleven million, six hundred eighty thousand, four hundred forty-seven".