199108981739 has 2 divisors, whose sum is σ = 199108981740. Its totient is φ = 199108981738.

The previous prime is 199108981717. The next prime is 199108981777. The reversal of 199108981739 is 937189801991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199108981739 - 2⁸ = 199108981483 is a prime.

It is not a weakly prime, because it can be changed into another prime (199108981339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99554490869 + 99554490870.

It is an arithmetic number, because the mean of its divisors is an integer number (99554490870).

Almost surely, 2^199108981739 is an apocalyptic number.

199108981739 is a deficient number, since it is larger than the sum of its proper divisors (1).

199108981739 is an equidigital number, since it uses as much as digits as its factorization.

199108981739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 65.

The spelling of 199108981739 in words is "one hundred ninety-nine billion, one hundred eight million, nine hundred eighty-one thousand, seven hundred thirty-nine".