659697993 has 32 divisors (see below), whose sum is σ = 1040400000. Its totient is φ = 411941376.

The previous prime is 659697977. The next prime is 659698019. The reversal of 659697993 is 399796956.

It is not a de Polignac number, because 659697993 - 2⁴ = 659697977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 659697993.

It is not an unprimeable number, because it can be changed into a prime (659697923) 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 31 ways as a sum of consecutive naturals, for example, 38433 + ... + 52881.

It is an arithmetic number, because the mean of its divisors is an integer number (32512500).

Almost surely, 2^659697993 is an apocalyptic number.

It is an amenable number.

659697993 is a deficient number, since it is larger than the sum of its proper divisors (380702007).

659697993 is a wasteful number, since it uses less digits than its factorization.

659697993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14566 (or 14560 counting only the distinct ones).

The product of its digits is 24800580, while the sum is 63.

The square root of 659697993 is about 25684.5866815100. The cubic root of 659697993 is about 870.5259483296.

The spelling of 659697993 in words is "six hundred fifty-nine million, six hundred ninety-seven thousand, nine hundred ninety-three".