80543819 has 2 divisors, whose sum is σ = 80543820. Its totient is φ = 80543818.

The previous prime is 80543789. The next prime is 80543821. The reversal of 80543819 is 91834508.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80543819 - 2⁸ = 80543563 is a prime.

It is a super-2 number, since 2×80543819² = 12974613558209522, which contains 22 as substring.

Together with 80543821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80543899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40271909 + 40271910.

It is an arithmetic number, because the mean of its divisors is an integer number (40271910).

Almost surely, 2^80543819 is an apocalyptic number.

80543819 is a deficient number, since it is larger than the sum of its proper divisors (1).

80543819 is an equidigital number, since it uses as much as digits as its factorization.

80543819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 80543819 is about 8974.6208276450. The cubic root of 80543819 is about 431.8610860941.

The spelling of 80543819 in words is "eighty million, five hundred forty-three thousand, eight hundred nineteen".