80659 has 4 divisors (see below), whose sum is σ = 81760. Its totient is φ = 79560.

The previous prime is 80657. The next prime is 80669. The reversal of 80659 is 95608.

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 80659 - 2¹ = 80657 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (80651) 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, 432 + ... + 589.

It is an arithmetic number, because the mean of its divisors is an integer number (20440).

2⁸⁰⁶⁵⁹ is an apocalyptic number.

80659 is a deficient number, since it is larger than the sum of its proper divisors (1101).

80659 is a wasteful number, since it uses less digits than its factorization.

80659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 80659 is about 284.0052816410. The cubic root of 80659 is about 43.2066847794.

The spelling of 80659 in words is "eighty thousand, six hundred fifty-nine".