80305109 has 4 divisors (see below), whose sum is σ = 80659104. Its totient is φ = 79951116.

The previous prime is 80305103. The next prime is 80305139. The reversal of 80305109 is 90150308.

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 a de Polignac number, because none of the positive numbers 2^k-80305109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80305103) 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, 176657 + ... + 177110.

It is an arithmetic number, because the mean of its divisors is an integer number (20164776).

Almost surely, 2^80305109 is an apocalyptic number.

It is an amenable number.

80305109 is a deficient number, since it is larger than the sum of its proper divisors (353995).

80305109 is a wasteful number, since it uses less digits than its factorization.

80305109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353994.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 80305109 is about 8961.3117901343. The cubic root of 80305109 is about 431.4340242690.

The spelling of 80305109 in words is "eighty million, three hundred five thousand, one hundred nine".