680000071 has 2 divisors, whose sum is σ = 680000072. Its totient is φ = 680000070.

The previous prime is 680000059. The next prime is 680000107. The reversal of 680000071 is 170000086.

Together with next prime (680000107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680000071 - 2⁹ = 679999559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 679999997 and 680000051.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680000021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340000035 + 340000036.

It is an arithmetic number, because the mean of its divisors is an integer number (340000036).

Almost surely, 2^680000071 is an apocalyptic number.

680000071 is a deficient number, since it is larger than the sum of its proper divisors (1).

680000071 is an equidigital number, since it uses as much as digits as its factorization.

680000071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 680000071 is about 26076.8109821734. The cubic root of 680000071 is about 879.3659650370.

The spelling of 680000071 in words is "six hundred eighty million, seventy-one", and thus it is an aban number.