199955003137 has 2 divisors, whose sum is σ = 199955003138. Its totient is φ = 199955003136.

The previous prime is 199955003123. The next prime is 199955003141. The reversal of 199955003137 is 731300559991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148224230001 + 51730773136 = 384999^2 + 227444^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199955003137 is a prime.

It is not a weakly prime, because it can be changed into another prime (199955003167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99977501568 + 99977501569.

It is an arithmetic number, because the mean of its divisors is an integer number (99977501569).

Almost surely, 2^199955003137 is an apocalyptic number.

It is an amenable number.

199955003137 is a deficient number, since it is larger than the sum of its proper divisors (1).

199955003137 is an equidigital number, since it uses as much as digits as its factorization.

199955003137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1148175, while the sum is 52.

The spelling of 199955003137 in words is "one hundred ninety-nine billion, nine hundred fifty-five million, three thousand, one hundred thirty-seven".