80809813 has 8 divisors (see below), whose sum is σ = 94850432. Its totient is φ = 67393296.

The previous prime is 80809769. The next prime is 80809843. The reversal of 80809813 is 31890808.

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

It is a cyclic number.

It is not a de Polignac number, because 80809813 - 2⁹ = 80809301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80809843) 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, 155745 + ... + 156262.

It is an arithmetic number, because the mean of its divisors is an integer number (11856304).

Almost surely, 2^80809813 is an apocalyptic number.

It is an amenable number.

80809813 is a deficient number, since it is larger than the sum of its proper divisors (14040619).

80809813 is a wasteful number, since it uses less digits than its factorization.

80809813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312051.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 80809813 is about 8989.4278460868. The cubic root of 80809813 is about 432.3359672878.

The spelling of 80809813 in words is "eighty million, eight hundred nine thousand, eight hundred thirteen".