684131330 has 32 divisors (see below), whose sum is σ = 1263911040. Its totient is φ = 266462080.

The previous prime is 684131213. The next prime is 684131353. The reversal of 684131330 is 33131486.

It is a junction number, because it is equal to n+sod(n) for n = 684131293 and 684131302.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263981 + ... + 266559.

It is an arithmetic number, because the mean of its divisors is an integer number (39497220).

Almost surely, 2^684131330 is an apocalyptic number.

684131330 is a deficient number, since it is larger than the sum of its proper divisors (579779710).

684131330 is a wasteful number, since it uses less digits than its factorization.

684131330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 684131330 is about 26155.9043047645. The cubic root of 684131330 is about 881.1431982971.

The spelling of 684131330 in words is "six hundred eighty-four million, one hundred thirty-one thousand, three hundred thirty".