80399109 has 16 divisors (see below), whose sum is σ = 122997888. Its totient is φ = 45760512.

The previous prime is 80399083. The next prime is 80399117. The reversal of 80399109 is 90199308.

It is not a de Polignac number, because 80399109 - 2⁹ = 80398597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80399119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2052 + ... + 12845.

It is an arithmetic number, because the mean of its divisors is an integer number (7687368).

Almost surely, 2^80399109 is an apocalyptic number.

It is an amenable number.

80399109 is a deficient number, since it is larger than the sum of its proper divisors (42598779).

80399109 is a wasteful number, since it uses less digits than its factorization.

80399109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15164.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 80399109 is about 8966.5550240881. Note that the first 3 decimals coincide. The cubic root of 80399109 is about 431.6022949451.

It can be divided in two parts, 80399 and 109, that added together give a palindrome (80508).

The spelling of 80399109 in words is "eighty million, three hundred ninety-nine thousand, one hundred nine".