683399809 has 4 divisors (see below), whose sum is σ = 719368240. Its totient is φ = 647431380.

The previous prime is 683399803. The next prime is 683399833. The reversal of 683399809 is 908993386.

683399809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 683399809 - 2¹⁹ = 682875521 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 683399809.

It is not an unprimeable number, because it can be changed into a prime (683399803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17984187 + ... + 17984224.

It is an arithmetic number, because the mean of its divisors is an integer number (179842060).

Almost surely, 2^683399809 is an apocalyptic number.

It is an amenable number.

683399809 is a deficient number, since it is larger than the sum of its proper divisors (35968431).

683399809 is a wasteful number, since it uses less digits than its factorization.

683399809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35968430.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 683399809 is about 26141.9167047866. The cubic root of 683399809 is about 880.8290263424.

The spelling of 683399809 in words is "six hundred eighty-three million, three hundred ninety-nine thousand, eight hundred nine".