684021041 has 8 divisors (see below), whose sum is σ = 746396544. Its totient is φ = 621677520.

The previous prime is 684021031. The next prime is 684021047. The reversal of 684021041 is 140120486.

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 684021041 - 2⁶ = 684020977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 684021041.

It is not an unprimeable number, because it can be changed into a prime (684021047) 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, 69095 + ... + 78371.

It is an arithmetic number, because the mean of its divisors is an integer number (93299568).

Almost surely, 2^684021041 is an apocalyptic number.

It is an amenable number.

684021041 is a deficient number, since it is larger than the sum of its proper divisors (62375503).

684021041 is a wasteful number, since it uses less digits than its factorization.

684021041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15991.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 684021041 is about 26153.7959195219. The cubic root of 684021041 is about 881.0958459732.

The spelling of 684021041 in words is "six hundred eighty-four million, twenty-one thousand, forty-one".