489117421 has 8 divisors (see below), whose sum is σ = 557726904. Its totient is φ = 424934400.

The previous prime is 489117403. The next prime is 489117457. The reversal of 489117421 is 124711984.

It can be written as a sum of positive squares in 4 ways, for example, as 172633321 + 316484100 = 13139^2 + 17790^2 .

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 489117421 - 2⁹ = 489116909 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 (489117401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1106380 + ... + 1106821.

It is an arithmetic number, because the mean of its divisors is an integer number (69715863).

Almost surely, 2^489117421 is an apocalyptic number.

It is an amenable number.

489117421 is a deficient number, since it is larger than the sum of its proper divisors (68609483).

489117421 is a wasteful number, since it uses less digits than its factorization.

489117421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213231.

The product of its digits is 16128, while the sum is 37.

The square root of 489117421 is about 22115.9992087177. Note that the first 3 decimals coincide. The cubic root of 489117421 is about 787.8998972062.

The spelling of 489117421 in words is "four hundred eighty-nine million, one hundred seventeen thousand, four hundred twenty-one".