659007985 has 4 divisors (see below), whose sum is σ = 790809588. Its totient is φ = 527206384.

The previous prime is 659007961. The next prime is 659007991. The reversal of 659007985 is 589700956.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 239413729 + 419594256 = 15473^2 + 20484^2 .

It is a cyclic number.

It is not a de Polignac number, because 659007985 - 2⁷ = 659007857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 65900794 + ... + 65900803.

It is an arithmetic number, because the mean of its divisors is an integer number (197702397).

Almost surely, 2^659007985 is an apocalyptic number.

It is an amenable number.

659007985 is a deficient number, since it is larger than the sum of its proper divisors (131801603).

659007985 is a wasteful number, since it uses less digits than its factorization.

659007985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131801602.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 659007985 is about 25671.1508312347. The cubic root of 659007985 is about 870.2223349493. Note that the first 3 decimals are identical.

The spelling of 659007985 in words is "six hundred fifty-nine million, seven thousand, nine hundred eighty-five".