659841987 has 24 divisors (see below), whose sum is σ = 1048399632. Its totient is φ = 367852800.

The previous prime is 659841971. The next prime is 659842019. The reversal of 659841987 is 789148956.

659841987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 659841987 - 2⁴ = 659841971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (659841907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48714 + ... + 60767.

It is an arithmetic number, because the mean of its divisors is an integer number (43683318).

Almost surely, 2^659841987 is an apocalyptic number.

659841987 is a deficient number, since it is larger than the sum of its proper divisors (388557645).

659841987 is a wasteful number, since it uses less digits than its factorization.

659841987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109539 (or 109532 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 57.

The square root of 659841987 is about 25687.3896493980. The cubic root of 659841987 is about 870.5892810443.

The spelling of 659841987 in words is "six hundred fifty-nine million, eight hundred forty-one thousand, nine hundred eighty-seven".