684404485 has 8 divisors (see below), whose sum is σ = 822248856. Its totient is φ = 546881280.

The previous prime is 684404473. The next prime is 684404521. The reversal of 684404485 is 584404486.

It can be written as a sum of positive squares in 4 ways, for example, as 183629601 + 500774884 = 13551^2 + 22378^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 684404485 - 2¹¹ = 684402437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75576 + ... + 84145.

It is an arithmetic number, because the mean of its divisors is an integer number (102781107).

Almost surely, 2^684404485 is an apocalyptic number.

It is an amenable number.

684404485 is a deficient number, since it is larger than the sum of its proper divisors (137844371).

684404485 is a wasteful number, since it uses less digits than its factorization.

684404485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160583.

The product of its (nonzero) digits is 491520, while the sum is 43.

The square root of 684404485 is about 26161.1254536192. The cubic root of 684404485 is about 881.2604548497.

Subtracting from 684404485 its reverse (584404486), we obtain a palindrome (99999999).

The spelling of 684404485 in words is "six hundred eighty-four million, four hundred four thousand, four hundred eighty-five".