199993133 has 2 divisors, whose sum is σ = 199993134. Its totient is φ = 199993132.

The previous prime is 199993111. The next prime is 199993141. The reversal of 199993133 is 331399991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148181929 + 51811204 = 12173^2 + 7198^2 .

It is a cyclic number.

It is not a de Polignac number, because 199993133 - 2¹⁰ = 199992109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199993153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99996566 + 99996567.

It is an arithmetic number, because the mean of its divisors is an integer number (99996567).

Almost surely, 2^199993133 is an apocalyptic number.

It is an amenable number.

199993133 is a deficient number, since it is larger than the sum of its proper divisors (1).

199993133 is an equidigital number, since it uses as much as digits as its factorization.

199993133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 177147, while the sum is 47.

The square root of 199993133 is about 14141.8928365336. The cubic root of 199993133 is about 584.7968544894.

It can be divided in two parts, 19999 and 3133, that added together give a palindrome (23132).

The spelling of 199993133 in words is "one hundred ninety-nine million, nine hundred ninety-three thousand, one hundred thirty-three".