199601001 has 6 divisors (see below), whose sum is σ = 288312570. Its totient is φ = 133067328.

The previous prime is 199600987. The next prime is 199601009. The reversal of 199601001 is 100106991.

It can be written as a sum of positive squares in only one way, i.e., 151659225 + 47941776 = 12315^2 + 6924^2 .

It is not a de Polignac number, because 199601001 - 2¹⁷ = 199469929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (199601009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11088936 + ... + 11088953.

It is an arithmetic number, because the mean of its divisors is an integer number (48052095).

Almost surely, 2^199601001 is an apocalyptic number.

It is an amenable number.

199601001 is a deficient number, since it is larger than the sum of its proper divisors (88711569).

199601001 is a wasteful number, since it uses less digits than its factorization.

199601001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22177895 (or 22177892 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 199601001 is about 14128.0218360533. The cubic root of 199601001 is about 584.4143953576.

Adding to 199601001 its reverse (100106991), we get a palindrome (299707992).

The spelling of 199601001 in words is "one hundred ninety-nine million, six hundred one thousand, one".