80210809 has 4 divisors (see below), whose sum is σ = 91669504. Its totient is φ = 68752116.

The previous prime is 80210803. The next prime is 80210813. The reversal of 80210809 is 90801208.

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 not a de Polignac number, because 80210809 - 2⁹ = 80210297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80210803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5729337 + ... + 5729350.

It is an arithmetic number, because the mean of its divisors is an integer number (22917376).

Almost surely, 2^80210809 is an apocalyptic number.

It is an amenable number.

80210809 is a deficient number, since it is larger than the sum of its proper divisors (11458695).

80210809 is a wasteful number, since it uses less digits than its factorization.

80210809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11458694.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 80210809 is about 8956.0487381434. The cubic root of 80210809 is about 431.2650845665.

It can be divided in two parts, 802 and 10809, that added together give a palindrome (11611).

The spelling of 80210809 in words is "eighty million, two hundred ten thousand, eight hundred nine".