684282485 has 4 divisors (see below), whose sum is σ = 821138988. Its totient is φ = 547425984.

The previous prime is 684282481. The next prime is 684282517. The reversal of 684282485 is 584282486.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 460660369 + 223622116 = 21463^2 + 14954^2 .

It is a cyclic number.

It is not a de Polignac number, because 684282485 - 2² = 684282481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684282481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68428244 + ... + 68428253.

It is an arithmetic number, because the mean of its divisors is an integer number (205284747).

Almost surely, 2^684282485 is an apocalyptic number.

It is an amenable number.

684282485 is a deficient number, since it is larger than the sum of its proper divisors (136856503).

684282485 is a wasteful number, since it uses less digits than its factorization.

684282485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136856502.

The product of its digits is 983040, while the sum is 47.

The square root of 684282485 is about 26158.7936457322. The cubic root of 684282485 is about 881.2080880760.

Subtracting from 684282485 its reverse (584282486), we obtain a palindrome (99999999).

The spelling of 684282485 in words is "six hundred eighty-four million, two hundred eighty-two thousand, four hundred eighty-five".