659944 has 8 divisors (see below), whose sum is σ = 1237410. Its totient is φ = 329968.

The previous prime is 659941. The next prime is 659947. The reversal of 659944 is 449956.

It is an interprime number because it is at equal distance from previous prime (659941) and next prime (659947).

It can be written as a sum of positive squares in only one way, i.e., 656100 + 3844 = 810^2 + 62^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (659941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41239 + ... + 41254.

2⁶⁵⁹⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

659944 is a deficient number, since it is larger than the sum of its proper divisors (577466).

659944 is a wasteful number, since it uses less digits than its factorization.

659944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82499 (or 82495 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 659944 is about 812.3693741150. The cubic root of 659944 is about 87.0634143728.

The spelling of 659944 in words is "six hundred fifty-nine thousand, nine hundred forty-four".