1684854473213 has 2 divisors, whose sum is σ = 1684854473214. Its totient is φ = 1684854473212.

The previous prime is 1684854473209. The next prime is 1684854473233. The reversal of 1684854473213 is 3123744584861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1086727021444 + 598127451769 = 1042462^2 + 773387^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684854473213 - 2² = 1684854473209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1684854473233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842427236606 + 842427236607.

It is an arithmetic number, because the mean of its divisors is an integer number (842427236607).

Almost surely, 2^{1684854473213} is an apocalyptic number.

It is an amenable number.

1684854473213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684854473213 is an equidigital number, since it uses as much as digits as its factorization.

1684854473213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15482880, while the sum is 56.

The spelling of 1684854473213 in words is "one trillion, six hundred eighty-four billion, eight hundred fifty-four million, four hundred seventy-three thousand, two hundred thirteen".