199374401 has 2 divisors, whose sum is σ = 199374402. Its totient is φ = 199374400.

The previous prime is 199374397. The next prime is 199374403. The reversal of 199374401 is 104473991.

It is a Cunningham number, because it is equal to 14120²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199374400 + 1 = 14120^2 + 1^2 .

It is an emirp because it is prime and its reverse (104473991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199374401 - 2² = 199374397 is a prime.

Together with 199374403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199374403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99687200 + 99687201.

It is an arithmetic number, because the mean of its divisors is an integer number (99687201).

Almost surely, 2^199374401 is an apocalyptic number.

It is an amenable number.

199374401 is a deficient number, since it is larger than the sum of its proper divisors (1).

199374401 is an equidigital number, since it uses as much as digits as its factorization.

199374401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 199374401 is about 14120.0000354108. Note that the first 4 decimals coincide. The cubic root of 199374401 is about 584.1931565751.

The spelling of 199374401 in words is "one hundred ninety-nine million, three hundred seventy-four thousand, four hundred one".