684374305 has 8 divisors (see below), whose sum is σ = 821457000. Its totient is φ = 547360896.

The previous prime is 684374297. The next prime is 684374347. The reversal of 684374305 is 503473486.

It can be written as a sum of positive squares in 4 ways, for example, as 124389409 + 559984896 = 11153^2 + 23664^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 684374305 - 2³ = 684374297 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7701 + ... + 37789.

It is an arithmetic number, because the mean of its divisors is an integer number (102682125).

Almost surely, 2^684374305 is an apocalyptic number.

It is an amenable number.

684374305 is a deficient number, since it is larger than the sum of its proper divisors (137082695).

684374305 is a wasteful number, since it uses less digits than its factorization.

684374305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34643.

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 684374305 is about 26160.5486372132. The cubic root of 684374305 is about 881.2475010911.

The spelling of 684374305 in words is "six hundred eighty-four million, three hundred seventy-four thousand, three hundred five".