659938 has 4 divisors (see below), whose sum is σ = 989910. Its totient is φ = 329968.

The previous prime is 659917. The next prime is 659941. The reversal of 659938 is 839956.

659938 is nontrivially palindromic in base 15.

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

It can be written as a sum of positive squares in only one way, i.e., 644809 + 15129 = 803^2 + 123^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 659938.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164983 + ... + 164986.

2⁶⁵⁹⁹³⁸ is an apocalyptic number.

659938 is a deficient number, since it is larger than the sum of its proper divisors (329972).

659938 is a wasteful number, since it uses less digits than its factorization.

659938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329971.

The product of its digits is 58320, while the sum is 40.

The square root of 659938 is about 812.3656812052. The cubic root of 659938 is about 87.0631505211.

The spelling of 659938 in words is "six hundred fifty-nine thousand, nine hundred thirty-eight".