80840843 has 4 divisors (see below), whose sum is σ = 80864688. Its totient is φ = 80817000.

The previous prime is 80840833. The next prime is 80840861. The reversal of 80840843 is 34804808.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80840843 - 2⁸ = 80840587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80840833) 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, 5783 + ... + 13968.

It is an arithmetic number, because the mean of its divisors is an integer number (20216172).

Almost surely, 2^80840843 is an apocalyptic number.

80840843 is a deficient number, since it is larger than the sum of its proper divisors (23845).

80840843 is a wasteful number, since it uses less digits than its factorization.

80840843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23844.

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 80840843 is about 8991.1535967305. The cubic root of 80840843 is about 432.3912974835.

The spelling of 80840843 in words is "eighty million, eight hundred forty thousand, eight hundred forty-three".