1708845139 has 2 divisors, whose sum is σ = 1708845140. Its totient is φ = 1708845138.

The previous prime is 1708845137. The next prime is 1708845157. The reversal of 1708845139 is 9315488071.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1708845139 - 2¹ = 1708845137 is a prime.

Together with 1708845137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1708845137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 854422569 + 854422570.

It is an arithmetic number, because the mean of its divisors is an integer number (854422570).

Almost surely, 2^1708845139 is an apocalyptic number.

1708845139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1708845139 is an equidigital number, since it uses as much as digits as its factorization.

1708845139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 1708845139 is about 41338.1801607183. The cubic root of 1708845139 is about 1195.5495191534.

The spelling of 1708845139 in words is "one billion, seven hundred eight million, eight hundred forty-five thousand, one hundred thirty-nine".