80109 has 20 divisors (see below), whose sum is σ = 127776. Its totient is φ = 49896.

The previous prime is 80107. The next prime is 80111. The reversal of 80109 is 90108.

It is an interprime number because it is at equal distance from previous prime (80107) and next prime (80111).

It is not a de Polignac number, because 80109 - 2¹ = 80107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80091 and 80100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80107) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1842 + ... + 1884.

2⁸⁰¹⁰⁹ is an apocalyptic number.

It is an amenable number.

80109 is a deficient number, since it is larger than the sum of its proper divisors (47667).

80109 is a wasteful number, since it uses less digits than its factorization.

80109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 80109 is about 283.0353334833. The cubic root of 80109 is about 43.1082543680.

Subtracting 80109 from its reverse (90108), we obtain a palindrome (9999).

The spelling of 80109 in words is "eighty thousand, one hundred nine".