684054394 has 8 divisors (see below), whose sum is σ = 1026319968. Its totient is φ = 341947740.

The previous prime is 684054391. The next prime is 684054419. The reversal of 684054394 is 493450486.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 684054394.

It is not an unprimeable number, because it can be changed into a prime (684054391) by changing a digit.

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, 28312 + ... + 46579.

It is an arithmetic number, because the mean of its divisors is an integer number (128289996).

Almost surely, 2^684054394 is an apocalyptic number.

684054394 is a deficient number, since it is larger than the sum of its proper divisors (342265574).

684054394 is a wasteful number, since it uses less digits than its factorization.

684054394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79460.

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 684054394 is about 26154.4335438564. The cubic root of 684054394 is about 881.1101665425.

The spelling of 684054394 in words is "six hundred eighty-four million, fifty-four thousand, three hundred ninety-four".