659699 has 4 divisors (see below), whose sum is σ = 694440. Its totient is φ = 624960.

The previous prime is 659693. The next prime is 659713. The reversal of 659699 is 996956.

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

It is a cyclic number.

It is not a de Polignac number, because 659699 - 2¹⁶ = 594163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659693) 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, 17342 + ... + 17379.

It is an arithmetic number, because the mean of its divisors is an integer number (173610).

2⁶⁵⁹⁶⁹⁹ is an apocalyptic number.

659699 is a deficient number, since it is larger than the sum of its proper divisors (34741).

659699 is a wasteful number, since it uses less digits than its factorization.

659699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34740.

The product of its digits is 131220, while the sum is 44.

The square root of 659699 is about 812.2185666432. The cubic root of 659699 is about 87.0526391269.

The spelling of 659699 in words is "six hundred fifty-nine thousand, six hundred ninety-nine".