683399905 has 16 divisors (see below), whose sum is σ = 832809600. Its totient is φ = 538296832.

The previous prime is 683399863. The next prime is 683399911. The reversal of 683399905 is 509993386.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 683399905 - 2²⁷ = 549182177 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 85521 + ... + 93169.

It is an arithmetic number, because the mean of its divisors is an integer number (52050600).

Almost surely, 2^683399905 is an apocalyptic number.

It is an amenable number.

683399905 is a deficient number, since it is larger than the sum of its proper divisors (149409695).

683399905 is a wasteful number, since it uses less digits than its factorization.

683399905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7928.

The product of its (nonzero) digits is 1574640, while the sum is 52.

The square root of 683399905 is about 26141.9185409181. The cubic root of 683399905 is about 880.8290675870.

The spelling of 683399905 in words is "six hundred eighty-three million, three hundred ninety-nine thousand, nine hundred five".