199991053 has 2 divisors, whose sum is σ = 199991054. Its totient is φ = 199991052.

The previous prime is 199991041. The next prime is 199991059. The reversal of 199991053 is 350199991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196616484 + 3374569 = 14022^2 + 1837^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199991053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199990994 and 199991012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199991059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99995526 + 99995527.

It is an arithmetic number, because the mean of its divisors is an integer number (99995527).

Almost surely, 2^199991053 is an apocalyptic number.

It is an amenable number.

199991053 is a deficient number, since it is larger than the sum of its proper divisors (1).

199991053 is an equidigital number, since it uses as much as digits as its factorization.

199991053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98415, while the sum is 46.

The square root of 199991053 is about 14141.8192959746. The cubic root of 199991053 is about 584.7948271170.

The spelling of 199991053 in words is "one hundred ninety-nine million, nine hundred ninety-one thousand, fifty-three".