659717957 has 2 divisors, whose sum is σ = 659717958. Its totient is φ = 659717956.

The previous prime is 659717951. The next prime is 659718001. The reversal of 659717957 is 759717956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 659411041 + 306916 = 25679^2 + 554^2 .

It is a cyclic number.

It is not a de Polignac number, because 659717957 - 2⁴ = 659717941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (659717951) 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 as a sum of consecutive naturals, namely, 329858978 + 329858979.

It is an arithmetic number, because the mean of its divisors is an integer number (329858979).

Almost surely, 2^659717957 is an apocalyptic number.

It is an amenable number.

659717957 is a deficient number, since it is larger than the sum of its proper divisors (1).

659717957 is an equidigital number, since it uses as much as digits as its factorization.

659717957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4167450, while the sum is 56.

The square root of 659717957 is about 25684.9753163206. The cubic root of 659717957 is about 870.5347296229.

Subtracting 659717957 from its reverse (759717956), we obtain a palindrome (99999999).

The spelling of 659717957 in words is "six hundred fifty-nine million, seven hundred seventeen thousand, nine hundred fifty-seven".