80635209 has 8 divisors (see below), whose sum is σ = 107596992. Its totient is φ = 53715120.

The previous prime is 80635201. The next prime is 80635211. The reversal of 80635209 is 90253608.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80635209 - 2³ = 80635201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80635209.

It is not an unprimeable number, because it can be changed into a prime (80635201) 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 7 ways as a sum of consecutive naturals, for example, 5589 + ... + 13874.

It is an arithmetic number, because the mean of its divisors is an integer number (13449624).

Almost surely, 2^80635209 is an apocalyptic number.

It is an amenable number.

80635209 is a deficient number, since it is larger than the sum of its proper divisors (26961783).

80635209 is a wasteful number, since it uses less digits than its factorization.

80635209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20847.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 80635209 is about 8979.7109641681. The cubic root of 80635209 is about 432.0243631236.

The spelling of 80635209 in words is "eighty million, six hundred thirty-five thousand, two hundred nine".