659799 has 16 divisors (see below), whose sum is σ = 1117440. Its totient is φ = 376920.

The previous prime is 659783. The next prime is 659819. The reversal of 659799 is 997956.

It is not a de Polignac number, because 659799 - 2⁴ = 659783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1557 + ... + 1934.

It is an arithmetic number, because the mean of its divisors is an integer number (69840).

2⁶⁵⁹⁷⁹⁹ is an apocalyptic number.

659799 is a deficient number, since it is larger than the sum of its proper divisors (457641).

659799 is a wasteful number, since it uses less digits than its factorization.

659799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3507 (or 3501 counting only the distinct ones).

The product of its digits is 153090, while the sum is 45.

The square root of 659799 is about 812.2801240951. The cubic root of 659799 is about 87.0570375087.

The spelling of 659799 in words is "six hundred fifty-nine thousand, seven hundred ninety-nine".