1704981781189 has 2 divisors, whose sum is σ = 1704981781190. Its totient is φ = 1704981781188.

The previous prime is 1704981781121. The next prime is 1704981781229. The reversal of 1704981781189 is 9811871894071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 883302984964 + 821678796225 = 939842^2 + 906465^2 .

It is a cyclic number.

It is not a de Polignac number, because 1704981781189 - 2²³ = 1704973392581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1704981781189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1704981781109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 852490890594 + 852490890595.

It is an arithmetic number, because the mean of its divisors is an integer number (852490890595).

Almost surely, 2^{1704981781189} is an apocalyptic number.

It is an amenable number.

1704981781189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1704981781189 is an equidigital number, since it uses as much as digits as its factorization.

1704981781189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 64.

The spelling of 1704981781189 in words is "one trillion, seven hundred four billion, nine hundred eighty-one million, seven hundred eighty-one thousand, one hundred eighty-nine".