199994633 has 2 divisors, whose sum is σ = 199994634. Its totient is φ = 199994632.

The previous prime is 199994629. The next prime is 199994689. The reversal of 199994633 is 336499991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166203664 + 33790969 = 12892^2 + 5813^2 .

It is an emirp because it is prime and its reverse (336499991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199994633 - 2² = 199994629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (199994603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99997316 + 99997317.

It is an arithmetic number, because the mean of its divisors is an integer number (99997317).

Almost surely, 2^199994633 is an apocalyptic number.

It is an amenable number.

199994633 is a deficient number, since it is larger than the sum of its proper divisors (1).

199994633 is an equidigital number, since it uses as much as digits as its factorization.

199994633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1417176, while the sum is 53.

The square root of 199994633 is about 14141.9458703532. The cubic root of 199994633 is about 584.7983165280.

The spelling of 199994633 in words is "one hundred ninety-nine million, nine hundred ninety-four thousand, six hundred thirty-three".