199305421 has 32 divisors (see below), whose sum is σ = 249304320. Its totient is φ = 155520000.

The previous prime is 199305409. The next prime is 199305437. The reversal of 199305421 is 124503991.

199305421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a 5-Lehmer number, since φ(199305421) divides (199305421-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 199305421 - 2¹⁹ = 198781133 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199305451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 496821 + ... + 497221.

It is an arithmetic number, because the mean of its divisors is an integer number (7790760).

Almost surely, 2^199305421 is an apocalyptic number.

It is an amenable number.

199305421 is a deficient number, since it is larger than the sum of its proper divisors (49998899).

199305421 is a wasteful number, since it uses less digits than its factorization.

199305421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 199305421 is about 14117.5571895424. The cubic root of 199305421 is about 584.1257753198.

The spelling of 199305421 in words is "one hundred ninety-nine million, three hundred five thousand, four hundred twenty-one".