80719421 has 2 divisors, whose sum is σ = 80719422. Its totient is φ = 80719420.

The previous prime is 80719411. The next prime is 80719469. The reversal of 80719421 is 12491708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50623225 + 30096196 = 7115^2 + 5486^2 .

It is a cyclic number.

It is not a de Polignac number, because 80719421 - 2⁶ = 80719357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80719411) 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, 40359710 + 40359711.

It is an arithmetic number, because the mean of its divisors is an integer number (40359711).

Almost surely, 2^80719421 is an apocalyptic number.

It is an amenable number.

80719421 is a deficient number, since it is larger than the sum of its proper divisors (1).

80719421 is an equidigital number, since it uses as much as digits as its factorization.

80719421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 80719421 is about 8984.3987556208. The cubic root of 80719421 is about 432.1747067858.

The spelling of 80719421 in words is "eighty million, seven hundred nineteen thousand, four hundred twenty-one".