489728913 has 4 divisors (see below), whose sum is σ = 652971888. Its totient is φ = 326485940.

The previous prime is 489728893. The next prime is 489728927. The reversal of 489728913 is 319827984.

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 489728913 - 2¹⁴ = 489712529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (489728983) 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, 81621483 + ... + 81621488.

It is an arithmetic number, because the mean of its divisors is an integer number (163242972).

Almost surely, 2^489728913 is an apocalyptic number.

It is an amenable number.

489728913 is a deficient number, since it is larger than the sum of its proper divisors (163242975).

489728913 is a wasteful number, since it uses less digits than its factorization.

489728913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163242974.

The product of its digits is 870912, while the sum is 51.

The square root of 489728913 is about 22129.8195428702. The cubic root of 489728913 is about 788.2281032249.

The spelling of 489728913 in words is "four hundred eighty-nine million, seven hundred twenty-eight thousand, nine hundred thirteen".