1684854473749 has 2 divisors, whose sum is σ = 1684854473750. Its totient is φ = 1684854473748.

The previous prime is 1684854473717. The next prime is 1684854473767. The reversal of 1684854473749 is 9473744584861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1664569593124 + 20284880625 = 1290182^2 + 142425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684854473749 - 2⁵ = 1684854473717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1684854473779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842427236874 + 842427236875.

It is an arithmetic number, because the mean of its divisors is an integer number (842427236875).

Almost surely, 2^{1684854473749} is an apocalyptic number.

It is an amenable number.

1684854473749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684854473749 is an equidigital number, since it uses as much as digits as its factorization.

1684854473749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 650280960, while the sum is 70.

The spelling of 1684854473749 in words is "one trillion, six hundred eighty-four billion, eight hundred fifty-four million, four hundred seventy-three thousand, seven hundred forty-nine".