83909 has 4 divisors (see below), whose sum is σ = 95904. Its totient is φ = 71916.

The previous prime is 83903. The next prime is 83911. The reversal of 83909 is 90938.

83909 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83909 - 2⁸ = 83653 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83903) 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, 5987 + ... + 6000.

It is an arithmetic number, because the mean of its divisors is an integer number (23976).

2⁸³⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

83909 is a deficient number, since it is larger than the sum of its proper divisors (11995).

83909 is a wasteful number, since it uses less digits than its factorization.

83909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11994.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 83909 is about 289.6705024679. The cubic root of 83909 is about 43.7793707543.

Adding to 83909 its sum of digits (29), we get a palindrome (83938).

The spelling of 83909 in words is "eighty-three thousand, nine hundred nine".