1684251841 has 2 divisors, whose sum is σ = 1684251842. Its totient is φ = 1684251840.

The previous prime is 1684251773. The next prime is 1684251851. The reversal of 1684251841 is 1481524861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1683050625 + 1201216 = 41025^2 + 1096^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684251841 - 2¹¹ = 1684249793 is a prime.

It is a super-3 number, since 3×1684251841³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1684251794 and 1684251803.

It is not a weakly prime, because it can be changed into another prime (1684251851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842125920 + 842125921.

It is an arithmetic number, because the mean of its divisors is an integer number (842125921).

Almost surely, 2^1684251841 is an apocalyptic number.

It is an amenable number.

1684251841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684251841 is an equidigital number, since it uses as much as digits as its factorization.

1684251841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 40.

The square root of 1684251841 is about 41039.6374374823. The cubic root of 1684251841 is about 1189.7864270814.

The spelling of 1684251841 in words is "one billion, six hundred eighty-four million, two hundred fifty-one thousand, eight hundred forty-one".