80345819 has 2 divisors, whose sum is σ = 80345820. Its totient is φ = 80345818.

The previous prime is 80345777. The next prime is 80345821. The reversal of 80345819 is 91854308.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80345819 is a prime.

It is a super-2 number, since 2×80345819² = 12910901261561522, which contains 22 as substring.

Together with 80345821, 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 (80345879) 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, 40172909 + 40172910.

It is an arithmetic number, because the mean of its divisors is an integer number (40172910).

Almost surely, 2^80345819 is an apocalyptic number.

80345819 is a deficient number, since it is larger than the sum of its proper divisors (1).

80345819 is an equidigital number, since it uses as much as digits as its factorization.

80345819 is an odious number, because the sum of its binary digits is odd.

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

The square root of 80345819 is about 8963.5829331802. The cubic root of 80345819 is about 431.5069159038.

The spelling of 80345819 in words is "eighty million, three hundred forty-five thousand, eight hundred nineteen".