489640433 has 4 divisors (see below), whose sum is σ = 489730560. Its totient is φ = 489550308.

The previous prime is 489640397. The next prime is 489640483. The reversal of 489640433 is 334046984.

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 489640433 - 2¹² = 489636337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489640483) 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, 36353 + ... + 47966.

It is an arithmetic number, because the mean of its divisors is an integer number (122432640).

Almost surely, 2^489640433 is an apocalyptic number.

It is an amenable number.

489640433 is a deficient number, since it is larger than the sum of its proper divisors (90127).

489640433 is an equidigital number, since it uses as much as digits as its factorization.

489640433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90126.

The product of its (nonzero) digits is 248832, while the sum is 41.

The square root of 489640433 is about 22127.8203400154. The cubic root of 489640433 is about 788.1806302786.

The spelling of 489640433 in words is "four hundred eighty-nine million, six hundred forty thousand, four hundred thirty-three".