684016117 has 2 divisors, whose sum is σ = 684016118. Its totient is φ = 684016116.

The previous prime is 684016033. The next prime is 684016139. The reversal of 684016117 is 711610486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 671120836 + 12895281 = 25906^2 + 3591^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684016117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684016217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342008058 + 342008059.

It is an arithmetic number, because the mean of its divisors is an integer number (342008059).

Almost surely, 2^684016117 is an apocalyptic number.

It is an amenable number.

684016117 is a deficient number, since it is larger than the sum of its proper divisors (1).

684016117 is an equidigital number, since it uses as much as digits as its factorization.

684016117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 684016117 is about 26153.7017838776. The cubic root of 684016117 is about 881.0937317467.

The spelling of 684016117 in words is "six hundred eighty-four million, sixteen thousand, one hundred seventeen".