684383459 has 2 divisors, whose sum is σ = 684383460. Its totient is φ = 684383458.

The previous prime is 684383417. The next prime is 684383489. The reversal of 684383459 is 954383486.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684383459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (684383489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342191729 + 342191730.

It is an arithmetic number, because the mean of its divisors is an integer number (342191730).

Almost surely, 2^684383459 is an apocalyptic number.

684383459 is a deficient number, since it is larger than the sum of its proper divisors (1).

684383459 is an equidigital number, since it uses as much as digits as its factorization.

684383459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 50.

The square root of 684383459 is about 26160.7235947326. The cubic root of 684383459 is about 881.2514301806.

The spelling of 684383459 in words is "six hundred eighty-four million, three hundred eighty-three thousand, four hundred fifty-nine".