289143485 has 8 divisors (see below), whose sum is σ = 358936920. Its totient is φ = 223338304.

The previous prime is 289143473. The next prime is 289143487. The reversal of 289143485 is 584341982.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 755161 + 288388324 = 869^2 + 16982^2 .

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 289143485 - 2⁸ = 289143229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289143487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996902 + ... + 997191.

It is an arithmetic number, because the mean of its divisors is an integer number (44867115).

Almost surely, 2^289143485 is an apocalyptic number.

It is an amenable number.

289143485 is a deficient number, since it is larger than the sum of its proper divisors (69793435).

289143485 is a wasteful number, since it uses less digits than its factorization.

289143485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994127.

The product of its digits is 276480, while the sum is 44.

The square root of 289143485 is about 17004.2196233758. The cubic root of 289143485 is about 661.2583012169.

The spelling of 289143485 in words is "two hundred eighty-nine million, one hundred forty-three thousand, four hundred eighty-five".