684241447 has 2 divisors, whose sum is σ = 684241448. Its totient is φ = 684241446.

The previous prime is 684241417. The next prime is 684241451. The reversal of 684241447 is 744142486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 684241447 - 2²³ = 675852839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684241417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342120723 + 342120724.

It is an arithmetic number, because the mean of its divisors is an integer number (342120724).

Almost surely, 2^684241447 is an apocalyptic number.

684241447 is a deficient number, since it is larger than the sum of its proper divisors (1).

684241447 is an equidigital number, since it uses as much as digits as its factorization.

684241447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172032, while the sum is 40.

The square root of 684241447 is about 26158.0092323556. The cubic root of 684241447 is about 881.1904716961.

The spelling of 684241447 in words is "six hundred eighty-four million, two hundred forty-one thousand, four hundred forty-seven".