199996091137 has 2 divisors, whose sum is σ = 199996091138. Its totient is φ = 199996091136.

The previous prime is 199996091101. The next prime is 199996091209. The reversal of 199996091137 is 731190699991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197767873521 + 2228217616 = 444711^2 + 47204^2 .

It is an emirp because it is prime and its reverse (731190699991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199996091137 is a prime.

It is not a weakly prime, because it can be changed into another prime (199996091437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99998045568 + 99998045569.

It is an arithmetic number, because the mean of its divisors is an integer number (99998045569).

Almost surely, 2^199996091137 is an apocalyptic number.

It is an amenable number.

199996091137 is a deficient number, since it is larger than the sum of its proper divisors (1).

199996091137 is an equidigital number, since it uses as much as digits as its factorization.

199996091137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7440174, while the sum is 64.

The spelling of 199996091137 in words is "one hundred ninety-nine billion, nine hundred ninety-six million, ninety-one thousand, one hundred thirty-seven".