684777485 has 16 divisors (see below), whose sum is σ = 939559296. Its totient is φ = 469343808.

The previous prime is 684777469. The next prime is 684777487. The reversal of 684777485 is 584777486.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 684777485 - 2⁴ = 684777469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 684777485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684777487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120314 + ... + 125876.

It is an arithmetic number, because the mean of its divisors is an integer number (58722456).

Almost surely, 2^684777485 is an apocalyptic number.

It is an amenable number.

684777485 is a deficient number, since it is larger than the sum of its proper divisors (254781811).

684777485 is a wasteful number, since it uses less digits than its factorization.

684777485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9092.

The product of its digits is 10536960, while the sum is 56.

The square root of 684777485 is about 26168.2533807666. The cubic root of 684777485 is about 881.4205212331.

Subtracting from 684777485 its reverse (584777486), we obtain a palindrome (99999999).

The spelling of 684777485 in words is "six hundred eighty-four million, seven hundred seventy-seven thousand, four hundred eighty-five".