659940693 has 8 divisors (see below), whose sum is σ = 880044000. Its totient is φ = 439898928.

The previous prime is 659940689. The next prime is 659940703. The reversal of 659940693 is 396049956.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 659940693 - 2² = 659940689 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659940613) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24163 + ... + 43631.

It is an arithmetic number, because the mean of its divisors is an integer number (110005500).

Almost surely, 2^659940693 is an apocalyptic number.

It is an amenable number.

659940693 is a deficient number, since it is larger than the sum of its proper divisors (220103307).

659940693 is a wasteful number, since it uses less digits than its factorization.

659940693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30771.

The product of its (nonzero) digits is 1574640, while the sum is 51.

The square root of 659940693 is about 25689.3108704768. The cubic root of 659940693 is about 870.6326894677.

The spelling of 659940693 in words is "six hundred fifty-nine million, nine hundred forty thousand, six hundred ninety-three".