199578133 has 2 divisors, whose sum is σ = 199578134. Its totient is φ = 199578132.

The previous prime is 199578073. The next prime is 199578157. The reversal of 199578133 is 331875991.

It is a happy number.

199578133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117983044 + 81595089 = 10862^2 + 9033^2 .

It is a cyclic number.

It is not a de Polignac number, because 199578133 - 2¹³ = 199569941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199578733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99789066 + 99789067.

It is an arithmetic number, because the mean of its divisors is an integer number (99789067).

Almost surely, 2^199578133 is an apocalyptic number.

It is an amenable number.

199578133 is a deficient number, since it is larger than the sum of its proper divisors (1).

199578133 is an equidigital number, since it uses as much as digits as its factorization.

199578133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 46.

The square root of 199578133 is about 14127.2124992866. The cubic root of 199578133 is about 584.3920759992.

The spelling of 199578133 in words is "one hundred ninety-nine million, five hundred seventy-eight thousand, one hundred thirty-three".