1684630841 has 2 divisors, whose sum is σ = 1684630842. Its totient is φ = 1684630840.

The previous prime is 1684630819. The next prime is 1684630853. The reversal of 1684630841 is 1480364861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1451305216 + 233325625 = 38096^2 + 15275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684630841 - 2⁶ = 1684630777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1684630741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842315420 + 842315421.

It is an arithmetic number, because the mean of its divisors is an integer number (842315421).

Almost surely, 2^1684630841 is an apocalyptic number.

It is an amenable number.

1684630841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684630841 is an equidigital number, since it uses as much as digits as its factorization.

1684630841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 1684630841 is about 41044.2546649345. The cubic root of 1684630841 is about 1189.8756645746.

The spelling of 1684630841 in words is "one billion, six hundred eighty-four million, six hundred thirty thousand, eight hundred forty-one".