1680926839 has 2 divisors, whose sum is σ = 1680926840. Its totient is φ = 1680926838.

The previous prime is 1680926837. The next prime is 1680926881. The reversal of 1680926839 is 9386290861.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9386290861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1680926839 - 2¹ = 1680926837 is a prime.

Together with 1680926837, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680926831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840463419 + 840463420.

It is an arithmetic number, because the mean of its divisors is an integer number (840463420).

Almost surely, 2^1680926839 is an apocalyptic number.

1680926839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680926839 is an equidigital number, since it uses as much as digits as its factorization.

1680926839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The square root of 1680926839 is about 40999.1077829750. The cubic root of 1680926839 is about 1189.0029638023.

The spelling of 1680926839 in words is "one billion, six hundred eighty million, nine hundred twenty-six thousand, eight hundred thirty-nine".