78000089 has 2 divisors, whose sum is σ = 78000090. Its totient is φ = 78000088.

The previous prime is 78000071. The next prime is 78000101. The reversal of 78000089 is 98000087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75550864 + 2449225 = 8692^2 + 1565^2 .

It is a cyclic number.

It is not a de Polignac number, because 78000089 - 2⁸ = 77999833 is a prime.

It is not a weakly prime, because it can be changed into another prime (78000019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39000044 + 39000045.

It is an arithmetic number, because the mean of its divisors is an integer number (39000045).

Almost surely, 2^78000089 is an apocalyptic number.

It is an amenable number.

78000089 is a deficient number, since it is larger than the sum of its proper divisors (1).

78000089 is an equidigital number, since it uses as much as digits as its factorization.

78000089 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 78000089 is about 8831.7659049592. The cubic root of 78000089 is about 427.2660306768.

The spelling of 78000089 in words is "seventy-eight million, eighty-nine", and thus it is an aban number and an uban number.