80807813 has 4 divisors (see below), whose sum is σ = 80837568. Its totient is φ = 80778060.

The previous prime is 80807767. The next prime is 80807819. The reversal of 80807813 is 31870808.

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 80807813 - 2¹² = 80803717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80807819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10343 + ... + 16388.

It is an arithmetic number, because the mean of its divisors is an integer number (20209392).

Almost surely, 2^80807813 is an apocalyptic number.

It is an amenable number.

80807813 is a deficient number, since it is larger than the sum of its proper divisors (29755).

80807813 is a wasteful number, since it uses less digits than its factorization.

80807813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29754.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 80807813 is about 8989.3166036134. The cubic root of 80807813 is about 432.3324005631.

The spelling of 80807813 in words is "eighty million, eight hundred seven thousand, eight hundred thirteen".