684480337 has 4 divisors (see below), whose sum is σ = 685339956. Its totient is φ = 683620720.

The previous prime is 684480311. The next prime is 684480347. The reversal of 684480337 is 733084486.

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 475937856 + 208542481 = 21816^2 + 14441^2 .

It is a cyclic number.

It is not a de Polignac number, because 684480337 - 2²³ = 676091729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 684480293 and 684480302.

It is not an unprimeable number, because it can be changed into a prime (684480347) 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, 428614 + ... + 430207.

It is an arithmetic number, because the mean of its divisors is an integer number (171334989).

Almost surely, 2^684480337 is an apocalyptic number.

It is an amenable number.

684480337 is a deficient number, since it is larger than the sum of its proper divisors (859619).

684480337 is an equidigital number, since it uses as much as digits as its factorization.

684480337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859618.

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 684480337 is about 26162.5751217268. The cubic root of 684480337 is about 881.2930101101.

The spelling of 684480337 in words is "six hundred eighty-four million, four hundred eighty thousand, three hundred thirty-seven".