489931313 has 8 divisors (see below), whose sum is σ = 518986440. Its totient is φ = 460902400.

The previous prime is 489931301. The next prime is 489931327. The reversal of 489931313 is 313139984.

It can be written as a sum of positive squares in 4 ways, for example, as 237375649 + 252555664 = 15407^2 + 15892^2 .

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 489931313 - 2⁴ = 489931297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489931363) 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, 42473 + ... + 52761.

It is an arithmetic number, because the mean of its divisors is an integer number (64873305).

Almost surely, 2^489931313 is an apocalyptic number.

It is an amenable number.

489931313 is a deficient number, since it is larger than the sum of its proper divisors (29055127).

489931313 is a wasteful number, since it uses less digits than its factorization.

489931313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13107.

The product of its digits is 69984, while the sum is 41.

The square root of 489931313 is about 22134.3920856210. The cubic root of 489931313 is about 788.3366771662.

The spelling of 489931313 in words is "four hundred eighty-nine million, nine hundred thirty-one thousand, three hundred thirteen".