80840813 has 8 divisors (see below), whose sum is σ = 82218240. Its totient is φ = 79470160.

The previous prime is 80840789. The next prime is 80840833. The reversal of 80840813 is 31804808.

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 80840813 - 2¹⁰ = 80839789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80840813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80840833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26156 + ... + 29082.

It is an arithmetic number, because the mean of its divisors is an integer number (10277280).

Almost surely, 2^80840813 is an apocalyptic number.

It is an amenable number.

80840813 is a deficient number, since it is larger than the sum of its proper divisors (1377427).

80840813 is a wasteful number, since it uses less digits than its factorization.

80840813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 80840813 is about 8991.1519284239. The cubic root of 80840813 is about 432.3912439968.

The spelling of 80840813 in words is "eighty million, eight hundred forty thousand, eight hundred thirteen".