659926997 has 4 divisors (see below), whose sum is σ = 663613920. Its totient is φ = 656240076.

The previous prime is 659926991. The next prime is 659926999. The reversal of 659926997 is 799629956.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 659926997 - 2¹⁴ = 659910613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659926991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1843193 + ... + 1843550.

It is an arithmetic number, because the mean of its divisors is an integer number (165903480).

Almost surely, 2^659926997 is an apocalyptic number.

It is an amenable number.

659926997 is a deficient number, since it is larger than the sum of its proper divisors (3686923).

659926997 is a wasteful number, since it uses less digits than its factorization.

659926997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686922.

The product of its digits is 16533720, while the sum is 62.

The square root of 659926997 is about 25689.0442990782. The cubic root of 659926997 is about 870.6266665690.

The spelling of 659926997 in words is "six hundred fifty-nine million, nine hundred twenty-six thousand, nine hundred ninety-seven".