684017349 has 8 divisors (see below), whose sum is σ = 921053472. Its totient is φ = 451496400.

The previous prime is 684017329. The next prime is 684017351. The reversal of 684017349 is 943710486.

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

It is not a de Polignac number, because 684017349 - 2⁵ = 684017317 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 684017349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684017329) by changing a digit.

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, 1128439 + ... + 1129044.

It is an arithmetic number, because the mean of its divisors is an integer number (115131684).

Almost surely, 2^684017349 is an apocalyptic number.

It is an amenable number.

684017349 is a deficient number, since it is larger than the sum of its proper divisors (237036123).

684017349 is a wasteful number, since it uses less digits than its factorization.

684017349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257587.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 684017349 is about 26153.7253369381. The cubic root of 684017349 is about 881.0942607337.

The spelling of 684017349 in words is "six hundred eighty-four million, seventeen thousand, three hundred forty-nine".