16681479 has 4 divisors (see below), whose sum is σ = 22241976. Its totient is φ = 11120984.

The previous prime is 16681477. The next prime is 16681481. The reversal of 16681479 is 97418661.

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

It is an interprime number because it is at equal distance from previous prime (16681477) and next prime (16681481).

It is a cyclic number.

It is not a de Polignac number, because 16681479 - 2¹ = 16681477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16681479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780244 + ... + 2780249.

It is an arithmetic number, because the mean of its divisors is an integer number (5560494).

Almost surely, 2^16681479 is an apocalyptic number.

16681479 is a deficient number, since it is larger than the sum of its proper divisors (5560497).

16681479 is an equidigital number, since it uses as much as digits as its factorization.

16681479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560496.

The product of its digits is 72576, while the sum is 42.

The square root of 16681479 is about 4084.2966346729. The cubic root of 16681479 is about 255.5121272629.

The spelling of 16681479 in words is "sixteen million, six hundred eighty-one thousand, four hundred seventy-nine".