1680219829 has 2 divisors, whose sum is σ = 1680219830. Its totient is φ = 1680219828.

The previous prime is 1680219791. The next prime is 1680219847. The reversal of 1680219829 is 9289120861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1596002500 + 84217329 = 39950^2 + 9177^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680219829 - 2¹⁷ = 1680088757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680219869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840109914 + 840109915.

It is an arithmetic number, because the mean of its divisors is an integer number (840109915).

Almost surely, 2^1680219829 is an apocalyptic number.

It is an amenable number.

1680219829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680219829 is an equidigital number, since it uses as much as digits as its factorization.

1680219829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 1680219829 is about 40990.4846153348. The cubic root of 1680219829 is about 1188.8362393396.

The spelling of 1680219829 in words is "one billion, six hundred eighty million, two hundred nineteen thousand, eight hundred twenty-nine".