78080089 has 2 divisors, whose sum is σ = 78080090. Its totient is φ = 78080088.

The previous prime is 78080083. The next prime is 78080141. The reversal of 78080089 is 98008087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59521225 + 18558864 = 7715^2 + 4308^2 .

It is a cyclic number.

It is not a de Polignac number, because 78080089 - 2³ = 78080081 is a prime.

It is not a weakly prime, because it can be changed into another prime (78080081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39040044 + 39040045.

It is an arithmetic number, because the mean of its divisors is an integer number (39040045).

Almost surely, 2^78080089 is an apocalyptic number.

It is an amenable number.

78080089 is a deficient number, since it is larger than the sum of its proper divisors (1).

78080089 is an equidigital number, since it uses as much as digits as its factorization.

78080089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 78080089 is about 8836.2938497992. The cubic root of 78080089 is about 427.4120544556.

The spelling of 78080089 in words is "seventy-eight million, eighty thousand, eighty-nine".