684180071 has 2 divisors, whose sum is σ = 684180072. Its totient is φ = 684180070.

The previous prime is 684180041. The next prime is 684180073. The reversal of 684180071 is 170081486.

684180071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 684180071 - 2²⁶ = 617071207 is a prime.

It is a Sophie Germain prime.

Together with 684180073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684180073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342090035 + 342090036.

It is an arithmetic number, because the mean of its divisors is an integer number (342090036).

Almost surely, 2^684180071 is an apocalyptic number.

684180071 is a deficient number, since it is larger than the sum of its proper divisors (1).

684180071 is an equidigital number, since it uses as much as digits as its factorization.

684180071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 684180071 is about 26156.8360280826. The cubic root of 684180071 is about 881.1641235097.

The spelling of 684180071 in words is "six hundred eighty-four million, one hundred eighty thousand, seventy-one".