487601721 has 16 divisors (see below), whose sum is σ = 723078720. Its totient is φ = 324750240.

The previous prime is 487601717. The next prime is 487601743. The reversal of 487601721 is 127106784.

487601721 is a `hidden beast` number, since 48 + 7 + 601 + 7 + 2 + 1 = 666.

It is not a de Polignac number, because 487601721 - 2² = 487601717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (487601321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21181 + ... + 37733.

It is an arithmetic number, because the mean of its divisors is an integer number (45192420).

Almost surely, 2^487601721 is an apocalyptic number.

It is an amenable number.

487601721 is a deficient number, since it is larger than the sum of its proper divisors (235476999).

487601721 is a wasteful number, since it uses less digits than its factorization.

487601721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17653 (or 17647 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 487601721 is about 22081.7055727134. The cubic root of 487601721 is about 787.0851946970.

The spelling of 487601721 in words is "four hundred eighty-seven million, six hundred one thousand, seven hundred twenty-one".