683340639 has 4 divisors (see below), whose sum is σ = 911120856. Its totient is φ = 455560424.

The previous prime is 683340613. The next prime is 683340673. The reversal of 683340639 is 936043386.

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

It is a cyclic number.

It is not a de Polignac number, because 683340639 - 2¹² = 683336543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 683340639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683340689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113890104 + ... + 113890109.

It is an arithmetic number, because the mean of its divisors is an integer number (227780214).

Almost surely, 2^683340639 is an apocalyptic number.

683340639 is a deficient number, since it is larger than the sum of its proper divisors (227780217).

683340639 is a wasteful number, since it uses less digits than its factorization.

683340639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227780216.

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 683340639 is about 26140.7849729116. The cubic root of 683340639 is about 880.8036043483.

The spelling of 683340639 in words is "six hundred eighty-three million, three hundred forty thousand, six hundred thirty-nine".