199356401 has 2 divisors, whose sum is σ = 199356402. Its totient is φ = 199356400.

The previous prime is 199356383. The next prime is 199356439. The reversal of 199356401 is 104653991.

It is an a-pointer prime, because the next prime (199356439) can be obtained adding 199356401 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118374400 + 80982001 = 10880^2 + 8999^2 .

It is a cyclic number.

It is not a de Polignac number, because 199356401 - 2⁶ = 199356337 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (199356461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99678200 + 99678201.

It is an arithmetic number, because the mean of its divisors is an integer number (99678201).

Almost surely, 2^199356401 is an apocalyptic number.

It is an amenable number.

199356401 is a deficient number, since it is larger than the sum of its proper divisors (1).

199356401 is an equidigital number, since it uses as much as digits as its factorization.

199356401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 199356401 is about 14119.3626272576. The cubic root of 199356401 is about 584.1755752587.

The spelling of 199356401 in words is "one hundred ninety-nine million, three hundred fifty-six thousand, four hundred one".