11681479 has 4 divisors (see below), whose sum is σ = 11749176. Its totient is φ = 11613784.

The previous prime is 11681459. The next prime is 11681489. The reversal of 11681479 is 97418611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97418611 = 53 ⋅1838087.

It is a cyclic number.

It is not a de Polignac number, because 11681479 - 2⁹ = 11680967 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 (11681429) 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, 33589 + ... + 33934.

It is an arithmetic number, because the mean of its divisors is an integer number (2937294).

Almost surely, 2^11681479 is an apocalyptic number.

11681479 is a deficient number, since it is larger than the sum of its proper divisors (67697).

11681479 is an equidigital number, since it uses as much as digits as its factorization.

11681479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67696.

The product of its digits is 12096, while the sum is 37.

The square root of 11681479 is about 3417.8178710985. The cubic root of 11681479 is about 226.8990151580.

It can be divided in two parts, 1168147 and 9, that added together give a triangular number (1168156 = T₁₅₂₈).

The spelling of 11681479 in words is "eleven million, six hundred eighty-one thousand, four hundred seventy-nine".