17985479 has 4 divisors (see below), whose sum is σ = 17993976. Its totient is φ = 17976984.

The previous prime is 17985469. The next prime is 17985493. The reversal of 17985479 is 97458971.

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, and also an emirpimes, since its reverse is a distinct semiprime: 97458971 = 109 ⋅894119.

It is a cyclic number.

It is not a de Polignac number, because 17985479 - 2⁴ = 17985463 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 (17985469) 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, 1757 + ... + 6249.

It is an arithmetic number, because the mean of its divisors is an integer number (4498494).

Almost surely, 2^17985479 is an apocalyptic number.

17985479 is a deficient number, since it is larger than the sum of its proper divisors (8497).

17985479 is an equidigital number, since it uses as much as digits as its factorization.

17985479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8496.

The product of its digits is 635040, while the sum is 50.

The square root of 17985479 is about 4240.9290255792. The cubic root of 17985479 is about 262.0036467841.

It can be divided in two parts, 179 and 85479, that added together give a palindrome (85658).

The spelling of 17985479 in words is "seventeen million, nine hundred eighty-five thousand, four hundred seventy-nine".