80684109 has 12 divisors (see below), whose sum is σ = 127138752. Its totient is φ = 48899400.

The previous prime is 80684081. The next prime is 80684137. The reversal of 80684109 is 90148608.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (80684081) and next prime (80684137).

It is not a de Polignac number, because 80684109 - 2¹⁷ = 80553037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80684209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 407397 + ... + 407594.

It is an arithmetic number, because the mean of its divisors is an integer number (10594896).

Almost surely, 2^80684109 is an apocalyptic number.

It is an amenable number.

80684109 is a deficient number, since it is larger than the sum of its proper divisors (46454643).

80684109 is a wasteful number, since it uses less digits than its factorization.

80684109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815008 (or 815005 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 80684109 is about 8982.4333562794. The cubic root of 80684109 is about 432.1116770176. Note that the first 3 decimals are identical.

The spelling of 80684109 in words is "eighty million, six hundred eighty-four thousand, one hundred nine".