17889949 has 12 divisors (see below), whose sum is σ = 22703328. Its totient is φ = 13939800.

The previous prime is 17889947. The next prime is 17889953. The reversal of 17889949 is 94998871.

It is not a de Polignac number, because 17889949 - 2¹ = 17889947 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 17889949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17889947) 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 11 ways as a sum of consecutive naturals, for example, 16057 + ... + 17134.

It is an arithmetic number, because the mean of its divisors is an integer number (1891944).

Almost surely, 2^17889949 is an apocalyptic number.

It is an amenable number.

17889949 is a deficient number, since it is larger than the sum of its proper divisors (4813379).

17889949 is a wasteful number, since it uses less digits than its factorization.

17889949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33216 (or 33209 counting only the distinct ones).

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

The square root of 17889949 is about 4229.6511676496. The cubic root of 17889949 is about 261.5389449752.

The spelling of 17889949 in words is "seventeen million, eight hundred eighty-nine thousand, nine hundred forty-nine".