489638841 has 4 divisors (see below), whose sum is σ = 652851792. Its totient is φ = 326425892.

The previous prime is 489638803. The next prime is 489638899. The reversal of 489638841 is 148836984.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 489638841 - 2¹⁰ = 489637817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (489638801) 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, 81606471 + ... + 81606476.

It is an arithmetic number, because the mean of its divisors is an integer number (163212948).

Almost surely, 2^489638841 is an apocalyptic number.

It is an amenable number.

489638841 is a deficient number, since it is larger than the sum of its proper divisors (163212951).

489638841 is a wasteful number, since it uses less digits than its factorization.

489638841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163212950.

The product of its digits is 1327104, while the sum is 51.

The square root of 489638841 is about 22127.7843671706. The cubic root of 489638841 is about 788.1797760566.

The spelling of 489638841 in words is "four hundred eighty-nine million, six hundred thirty-eight thousand, eight hundred forty-one".