80027989 has 2 divisors, whose sum is σ = 80027990. Its totient is φ = 80027988.

The previous prime is 80027977. The next prime is 80028043. The reversal of 80027989 is 98972008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61105489 + 18922500 = 7817^2 + 4350^2 .

It is a cyclic number.

It is not a de Polignac number, because 80027989 - 2⁷ = 80027861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80027939) 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, 40013994 + 40013995.

It is an arithmetic number, because the mean of its divisors is an integer number (40013995).

Almost surely, 2^80027989 is an apocalyptic number.

It is an amenable number.

80027989 is a deficient number, since it is larger than the sum of its proper divisors (1).

80027989 is an equidigital number, since it uses as much as digits as its factorization.

80027989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 80027989 is about 8945.8364058371. The cubic root of 80027989 is about 430.9371825411.

The spelling of 80027989 in words is "eighty million, twenty-seven thousand, nine hundred eighty-nine".