489993561 has 12 divisors (see below), whose sum is σ = 709640880. Its totient is φ = 325798200.

The previous prime is 489993547. The next prime is 489993563. The reversal of 489993561 is 165399984.

It is not a de Polignac number, because 489993561 - 2⁷ = 489993433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 489993498 and 489993507.

It is not an unprimeable number, because it can be changed into a prime (489993563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68415 + ... + 75236.

It is an arithmetic number, because the mean of its divisors is an integer number (59136740).

Almost surely, 2^489993561 is an apocalyptic number.

It is an amenable number.

489993561 is a deficient number, since it is larger than the sum of its proper divisors (219647319).

489993561 is a wasteful number, since it uses less digits than its factorization.

489993561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144036 (or 144033 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 489993561 is about 22135.7981785162. The cubic root of 489993561 is about 788.3700630049.

The spelling of 489993561 in words is "four hundred eighty-nine million, nine hundred ninety-three thousand, five hundred sixty-one".