1684906369 has 2 divisors, whose sum is σ = 1684906370. Its totient is φ = 1684906368.

The previous prime is 1684906361. The next prime is 1684906381. The reversal of 1684906369 is 9636094861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1224160144 + 460746225 = 34988^2 + 21465^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684906369 - 2³ = 1684906361 is a prime.

It is a super-2 number, since 2×1684906369² = 5677818944593528322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1684906361) 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, 842453184 + 842453185.

It is an arithmetic number, because the mean of its divisors is an integer number (842453185).

Almost surely, 2^1684906369 is an apocalyptic number.

It is an amenable number.

1684906369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684906369 is an equidigital number, since it uses as much as digits as its factorization.

1684906369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 52.

The square root of 1684906369 is about 41047.6110023470. The cubic root of 1684906369 is about 1189.9405306533.

The spelling of 1684906369 in words is "one billion, six hundred eighty-four million, nine hundred six thousand, three hundred sixty-nine".