80043391 has 2 divisors, whose sum is σ = 80043392. Its totient is φ = 80043390.

The previous prime is 80043389. The next prime is 80043433. The reversal of 80043391 is 19334008.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80043391 - 2¹ = 80043389 is a prime.

Together with 80043389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80043331) 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 as a sum of consecutive naturals, namely, 40021695 + 40021696.

It is an arithmetic number, because the mean of its divisors is an integer number (40021696).

Almost surely, 2^80043391 is an apocalyptic number.

80043391 is a deficient number, since it is larger than the sum of its proper divisors (1).

80043391 is an equidigital number, since it uses as much as digits as its factorization.

80043391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 80043391 is about 8946.6972118207. The cubic root of 80043391 is about 430.9648264892.

Adding to 80043391 its reverse (19334008), we get a palindrome (99377399).

The spelling of 80043391 in words is "eighty million, forty-three thousand, three hundred ninety-one".