199401 has 4 divisors (see below), whose sum is σ = 265872. Its totient is φ = 132932.

The previous prime is 199399. The next prime is 199403. The reversal of 199401 is 104991.

199401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (199399) and next prime (199403).

It is a cyclic number.

It is not a de Polignac number, because 199401 - 2¹ = 199399 is a prime.

It is a D-number.

199401 is a lucky number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (199403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33231 + ... + 33236.

It is an arithmetic number, because the mean of its divisors is an integer number (66468).

2¹⁹⁹⁴⁰¹ is an apocalyptic number.

It is an amenable number.

199401 is a deficient number, since it is larger than the sum of its proper divisors (66471).

199401 is an equidigital number, since it uses as much as digits as its factorization.

199401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66470.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 199401 is about 446.5433909487. The cubic root of 199401 is about 58.4219134940.

The spelling of 199401 in words is "one hundred ninety-nine thousand, four hundred one".