659957 has 4 divisors (see below), whose sum is σ = 698796. Its totient is φ = 621120.

The previous prime is 659951. The next prime is 659963. The reversal of 659957 is 759956.

659957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (659951) and next prime (659963).

It can be written as a sum of positive squares in 2 ways, for example, as 461041 + 198916 = 679^2 + 446^2 .

It is a cyclic number.

It is not a de Polignac number, because 659957 - 2⁴ = 659941 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 (659951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19394 + ... + 19427.

It is an arithmetic number, because the mean of its divisors is an integer number (174699).

2⁶⁵⁹⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

659957 is a deficient number, since it is larger than the sum of its proper divisors (38839).

659957 is a wasteful number, since it uses less digits than its factorization.

659957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38838.

The product of its digits is 85050, while the sum is 41.

The square root of 659957 is about 812.3773753620. The cubic root of 659957 is about 87.0639860461.

Subtracting 659957 from its reverse (759956), we obtain a palindrome (99999).

The spelling of 659957 in words is "six hundred fifty-nine thousand, nine hundred fifty-seven".