80444387 has 2 divisors, whose sum is σ = 80444388. Its totient is φ = 80444386.

The previous prime is 80444381. The next prime is 80444431. The reversal of 80444387 is 78344408.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80444387 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80444387.

It is not a weakly prime, because it can be changed into another prime (80444381) 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, 40222193 + 40222194.

It is an arithmetic number, because the mean of its divisors is an integer number (40222194).

Almost surely, 2^80444387 is an apocalyptic number.

80444387 is a deficient number, since it is larger than the sum of its proper divisors (1).

80444387 is an equidigital number, since it uses as much as digits as its factorization.

80444387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 80444387 is about 8969.0794956896. The cubic root of 80444387 is about 431.6833009065.

The spelling of 80444387 in words is "eighty million, four hundred forty-four thousand, three hundred eighty-seven".