678308441029 has 2 divisors, whose sum is σ = 678308441030. Its totient is φ = 678308441028.

The previous prime is 678308441023. The next prime is 678308441033. The reversal of 678308441029 is 920144803876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 606253776129 + 72054664900 = 778623^2 + 268430^2 .

It is a cyclic number.

It is not a de Polignac number, because 678308441029 - 2³ = 678308441021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678308441021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339154220514 + 339154220515.

It is an arithmetic number, because the mean of its divisors is an integer number (339154220515).

Almost surely, 2^678308441029 is an apocalyptic number.

It is an amenable number.

678308441029 is a deficient number, since it is larger than the sum of its proper divisors (1).

678308441029 is an equidigital number, since it uses as much as digits as its factorization.

678308441029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 678308441029 in words is "six hundred seventy-eight billion, three hundred eight million, four hundred forty-one thousand, twenty-nine".