80719091 has 2 divisors, whose sum is σ = 80719092. Its totient is φ = 80719090.

The previous prime is 80719063. The next prime is 80719103. The reversal of 80719091 is 19091708.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80719091 - 2⁶ = 80719027 is a prime.

It is not a weakly prime, because it can be changed into another prime (80719031) 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, 40359545 + 40359546.

It is an arithmetic number, because the mean of its divisors is an integer number (40359546).

Almost surely, 2^80719091 is an apocalyptic number.

80719091 is a deficient number, since it is larger than the sum of its proper divisors (1).

80719091 is an equidigital number, since it uses as much as digits as its factorization.

80719091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 80719091 is about 8984.3803904332. The cubic root of 80719091 is about 432.1741178410.

The spelling of 80719091 in words is "eighty million, seven hundred nineteen thousand, ninety-one".