17998849 has 8 divisors (see below), whose sum is σ = 19680192. Its totient is φ = 16325040.

The previous prime is 17998847. The next prime is 17998859. The reversal of 17998849 is 94889971.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 17998849 - 2¹ = 17998847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17998849.

It is not an unprimeable number, because it can be changed into a prime (17998847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3907 + ... + 7159.

It is an arithmetic number, because the mean of its divisors is an integer number (2460024).

Almost surely, 2^17998849 is an apocalyptic number.

It is an amenable number.

17998849 is a deficient number, since it is larger than the sum of its proper divisors (1681343).

17998849 is a wasteful number, since it uses less digits than its factorization.

17998849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3767.

The product of its digits is 1306368, while the sum is 55.

The square root of 17998849 is about 4242.5050382999. The cubic root of 17998849 is about 262.0685532401.

It can be divided in two parts, 1799 and 8849, that added together give a cube (10648 = 22³).

The spelling of 17998849 in words is "seventeen million, nine hundred ninety-eight thousand, eight hundred forty-nine".