80421443 has 2 divisors, whose sum is σ = 80421444. Its totient is φ = 80421442.

The previous prime is 80421431. The next prime is 80421449. The reversal of 80421443 is 34412408.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80421443 - 2⁴ = 80421427 is a prime.

It is not a weakly prime, because it can be changed into another prime (80421449) 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 as a sum of consecutive naturals, namely, 40210721 + 40210722.

It is an arithmetic number, because the mean of its divisors is an integer number (40210722).

Almost surely, 2^80421443 is an apocalyptic number.

80421443 is a deficient number, since it is larger than the sum of its proper divisors (1).

80421443 is an equidigital number, since it uses as much as digits as its factorization.

80421443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 80421443 is about 8967.8003434510. The cubic root of 80421443 is about 431.6422560563.

The spelling of 80421443 in words is "eighty million, four hundred twenty-one thousand, four hundred forty-three".