289873009 has 8 divisors (see below), whose sum is σ = 301185000. Its totient is φ = 278648832.

The previous prime is 289873007. The next prime is 289873013. The reversal of 289873009 is 900378982.

It can be written as a sum of positive squares in 4 ways, for example, as 110313009 + 179560000 = 10503^2 + 13400^2 .

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 289873009 - 2¹ = 289873007 is a prime.

It is a super-2 number, since 2×289873009² = 168052722693428162, which contains 22 as substring.

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 289873009.

It is not an unprimeable number, because it can be changed into a prime (289873007) 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 7 ways as a sum of consecutive naturals, for example, 15184 + ... + 28465.

It is an arithmetic number, because the mean of its divisors is an integer number (37648125).

Almost surely, 2^289873009 is an apocalyptic number.

289873009 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

289873009 is a deficient number, since it is larger than the sum of its proper divisors (11311991).

289873009 is a wasteful number, since it uses less digits than its factorization.

289873009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43907.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 289873009 is about 17025.6573735054. The cubic root of 289873009 is about 661.8139638132.

The spelling of 289873009 in words is "two hundred eighty-nine million, eight hundred seventy-three thousand, nine".