489307761 has 6 divisors (see below), whose sum is σ = 706777890. Its totient is φ = 326205168.

The previous prime is 489307747. The next prime is 489307769. The reversal of 489307761 is 167703984.

It can be written as a sum of positive squares in only one way, i.e., 489250161 + 57600 = 22119^2 + 240^2 .

It is not a de Polignac number, because 489307761 - 2⁵ = 489307729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (489307769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27183756 + ... + 27183773.

It is an arithmetic number, because the mean of its divisors is an integer number (117796315).

Almost surely, 2^489307761 is an apocalyptic number.

It is an amenable number.

489307761 is a deficient number, since it is larger than the sum of its proper divisors (217470129).

489307761 is a wasteful number, since it uses less digits than its factorization.

489307761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54367535 (or 54367532 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 489307761 is about 22120.3020096924. The cubic root of 489307761 is about 788.0020876760.

The spelling of 489307761 in words is "four hundred eighty-nine million, three hundred seven thousand, seven hundred sixty-one".