684419059 has 2 divisors, whose sum is σ = 684419060. Its totient is φ = 684419058.

The previous prime is 684419017. The next prime is 684419069. The reversal of 684419059 is 950914486.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 684419059 - 2¹⁷ = 684287987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (684419069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342209529 + 342209530.

It is an arithmetic number, because the mean of its divisors is an integer number (342209530).

Almost surely, 2^684419059 is an apocalyptic number.

684419059 is a deficient number, since it is larger than the sum of its proper divisors (1).

684419059 is an equidigital number, since it uses as much as digits as its factorization.

684419059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 684419059 is about 26161.4039951987. The cubic root of 684419059 is about 881.2667101169.

The spelling of 684419059 in words is "six hundred eighty-four million, four hundred nineteen thousand, fifty-nine".