489728647 has 2 divisors, whose sum is σ = 489728648. Its totient is φ = 489728646.

The previous prime is 489728587. The next prime is 489728683. The reversal of 489728647 is 746827984.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 489728647 - 2²³ = 481340039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489728947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244864323 + 244864324.

It is an arithmetic number, because the mean of its divisors is an integer number (244864324).

Almost surely, 2^489728647 is an apocalyptic number.

489728647 is a deficient number, since it is larger than the sum of its proper divisors (1).

489728647 is an equidigital number, since it uses as much as digits as its factorization.

489728647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5419008, while the sum is 55.

The square root of 489728647 is about 22129.8135328791. The cubic root of 489728647 is about 788.2279605142.

The spelling of 489728647 in words is "four hundred eighty-nine million, seven hundred twenty-eight thousand, six hundred forty-seven".