684294001 has 4 divisors (see below), whose sum is σ = 685638900. Its totient is φ = 682949104.

The previous prime is 684293989. The next prime is 684294007. The reversal of 684294001 is 100492486.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 393625600 + 290668401 = 19840^2 + 17049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684294001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684294007) 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, 671686 + ... + 672703.

It is an arithmetic number, because the mean of its divisors is an integer number (171409725).

Almost surely, 2^684294001 is an apocalyptic number.

It is an amenable number.

684294001 is a deficient number, since it is larger than the sum of its proper divisors (1344899).

684294001 is a wasteful number, since it uses less digits than its factorization.

684294001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344898.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 684294001 is about 26159.0137619903. The cubic root of 684294001 is about 881.2130314220.

The spelling of 684294001 in words is "six hundred eighty-four million, two hundred ninety-four thousand, one".