684979430 has 8 divisors (see below), whose sum is σ = 1232962992. Its totient is φ = 273991768.

The previous prime is 684979429. The next prime is 684979517. The reversal of 684979430 is 34979486.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34248962 + ... + 34248981.

It is an arithmetic number, because the mean of its divisors is an integer number (154120374).

Almost surely, 2^684979430 is an apocalyptic number.

684979430 is a deficient number, since it is larger than the sum of its proper divisors (547983562).

684979430 is a wasteful number, since it uses less digits than its factorization.

684979430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68497950.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 684979430 is about 26172.1116840044. Note that the first 3 decimals coincide. The cubic root of 684979430 is about 881.5071581219.

The spelling of 684979430 in words is "six hundred eighty-four million, nine hundred seventy-nine thousand, four hundred thirty".