489677761 has 4 divisors (see below), whose sum is σ = 489958852. Its totient is φ = 489396672.

The previous prime is 489677729. The next prime is 489677791. The reversal of 489677761 is 167776984.

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 222159025 + 267518736 = 14905^2 + 16356^2 .

It is a cyclic number.

It is not a de Polignac number, because 489677761 - 2⁵ = 489677729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489677701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137916 + ... + 141421.

It is an arithmetic number, because the mean of its divisors is an integer number (122489713).

Almost surely, 2^489677761 is an apocalyptic number.

It is an amenable number.

489677761 is a deficient number, since it is larger than the sum of its proper divisors (281091).

489677761 is a wasteful number, since it uses less digits than its factorization.

489677761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281090.

The product of its digits is 3556224, while the sum is 55.

The square root of 489677761 is about 22128.6637870433. The cubic root of 489677761 is about 788.2006588935.

The spelling of 489677761 in words is "four hundred eighty-nine million, six hundred seventy-seven thousand, seven hundred sixty-one".