684584409623 has 2 divisors, whose sum is σ = 684584409624. Its totient is φ = 684584409622.

The previous prime is 684584409577. The next prime is 684584409653. The reversal of 684584409623 is 326904485486.

It is a happy number.

684584409623 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 684584409623 - 2⁸ = 684584409367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684584409653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342292204811 + 342292204812.

It is an arithmetic number, because the mean of its divisors is an integer number (342292204812).

Almost surely, 2^684584409623 is an apocalyptic number.

684584409623 is a deficient number, since it is larger than the sum of its proper divisors (1).

684584409623 is an equidigital number, since it uses as much as digits as its factorization.

684584409623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39813120, while the sum is 59.

The spelling of 684584409623 in words is "six hundred eighty-four billion, five hundred eighty-four million, four hundred nine thousand, six hundred twenty-three".