199430401 has 4 divisors (see below), whose sum is σ = 208101312. Its totient is φ = 190759492.

The previous prime is 199430393. The next prime is 199430503. The reversal of 199430401 is 104034991.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104034991 = 467 ⋅222773.

It is a cyclic number.

It is not a de Polignac number, because 199430401 - 2³ = 199430393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199430801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4335421 + ... + 4335466.

It is an arithmetic number, because the mean of its divisors is an integer number (52025328).

Almost surely, 2^199430401 is an apocalyptic number.

It is an amenable number.

199430401 is a deficient number, since it is larger than the sum of its proper divisors (8670911).

199430401 is an equidigital number, since it uses as much as digits as its factorization.

199430401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8670910.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 199430401 is about 14121.9828990124. The cubic root of 199430401 is about 584.2478472377.

The spelling of 199430401 in words is "one hundred ninety-nine million, four hundred thirty thousand, four hundred one".