678706073 has 2 divisors, whose sum is σ = 678706074. Its totient is φ = 678706072.

The previous prime is 678706031. The next prime is 678706123. The reversal of 678706073 is 370607876.

678706073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 542563849 + 136142224 = 23293^2 + 11668^2 .

It is a cyclic number.

It is not a de Polignac number, because 678706073 - 2⁶ = 678706009 is a prime.

It is not a weakly prime, because it can be changed into another prime (678756073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339353036 + 339353037.

It is an arithmetic number, because the mean of its divisors is an integer number (339353037).

Almost surely, 2^678706073 is an apocalyptic number.

It is an amenable number.

678706073 is a deficient number, since it is larger than the sum of its proper divisors (1).

678706073 is an equidigital number, since it uses as much as digits as its factorization.

678706073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 678706073 is about 26051.9878896026. The cubic root of 678706073 is about 878.8078178663.

The spelling of 678706073 in words is "six hundred seventy-eight million, seven hundred six thousand, seventy-three".