199768553 has 2 divisors, whose sum is σ = 199768554. Its totient is φ = 199768552.

The previous prime is 199768537. The next prime is 199768567. The reversal of 199768553 is 355867991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199289689 + 478864 = 14117^2 + 692^2 .

It is an emirp because it is prime and its reverse (355867991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199768553 - 2⁴ = 199768537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199768495 and 199768504.

It is not a weakly prime, because it can be changed into another prime (199798553) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99884276 + 99884277.

It is an arithmetic number, because the mean of its divisors is an integer number (99884277).

Almost surely, 2^199768553 is an apocalyptic number.

It is an amenable number.

199768553 is a deficient number, since it is larger than the sum of its proper divisors (1).

199768553 is an equidigital number, since it uses as much as digits as its factorization.

199768553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 53.

The square root of 199768553 is about 14133.9503678200. The cubic root of 199768553 is about 584.5778755238.

The spelling of 199768553 in words is "one hundred ninety-nine million, seven hundred sixty-eight thousand, five hundred fifty-three".