1680067639 has 2 divisors, whose sum is σ = 1680067640. Its totient is φ = 1680067638.

The previous prime is 1680067607. The next prime is 1680067667. The reversal of 1680067639 is 9367600861.

It is a strong prime.

It is an emirp because it is prime and its reverse (9367600861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1680067639 - 2⁵ = 1680067607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680067699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840033819 + 840033820.

It is an arithmetic number, because the mean of its divisors is an integer number (840033820).

Almost surely, 2^1680067639 is an apocalyptic number.

1680067639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680067639 is an equidigital number, since it uses as much as digits as its factorization.

1680067639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 1680067639 is about 40988.6281668465. The cubic root of 1680067639 is about 1188.8003443440.

The spelling of 1680067639 in words is "one billion, six hundred eighty million, sixty-seven thousand, six hundred thirty-nine".