11681279 has 4 divisors (see below), whose sum is σ = 11707080. Its totient is φ = 11655480.

The previous prime is 11681273. The next prime is 11681291. The reversal of 11681279 is 97218611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11681279 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 (11681273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12209 + ... + 13130.

It is an arithmetic number, because the mean of its divisors is an integer number (2926770).

Almost surely, 2^11681279 is an apocalyptic number.

11681279 is a deficient number, since it is larger than the sum of its proper divisors (25801).

11681279 is an equidigital number, since it uses as much as digits as its factorization.

11681279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25800.

The product of its digits is 6048, while the sum is 35.

The square root of 11681279 is about 3417.7886125388. The cubic root of 11681279 is about 226.8977202289.

The spelling of 11681279 in words is "eleven million, six hundred eighty-one thousand, two hundred seventy-nine".