489684761 has 4 divisors (see below), whose sum is σ = 489913524. Its totient is φ = 489456000.

The previous prime is 489684757. The next prime is 489684781. The reversal of 489684761 is 167486984.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 435515161 + 54169600 = 20869^2 + 7360^2 .

It is a cyclic number.

It is not a de Polignac number, because 489684761 - 2² = 489684757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489684781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111140 + ... + 115461.

It is an arithmetic number, because the mean of its divisors is an integer number (122478381).

Almost surely, 2^489684761 is an apocalyptic number.

It is an amenable number.

489684761 is a deficient number, since it is larger than the sum of its proper divisors (228763).

489684761 is a wasteful number, since it uses less digits than its factorization.

489684761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228762.

The product of its digits is 2322432, while the sum is 53.

The square root of 489684761 is about 22128.8219523769. The cubic root of 489684761 is about 788.2044146820.

The spelling of 489684761 in words is "four hundred eighty-nine million, six hundred eighty-four thousand, seven hundred sixty-one".