199473421 has 8 divisors (see below), whose sum is σ = 229116800. Its totient is φ = 170116848.

The previous prime is 199473371. The next prime is 199473451. The reversal of 199473421 is 124374991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199473421 - 2⁹ = 199472909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199473451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70206 + ... + 72991.

It is an arithmetic number, because the mean of its divisors is an integer number (28639600).

Almost surely, 2^199473421 is an apocalyptic number.

It is an amenable number.

199473421 is a deficient number, since it is larger than the sum of its proper divisors (29643379).

199473421 is a wasteful number, since it uses less digits than its factorization.

199473421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143403.

The product of its digits is 54432, while the sum is 40.

The square root of 199473421 is about 14123.5059740845. The cubic root of 199473421 is about 584.2898544328.

The spelling of 199473421 in words is "one hundred ninety-nine million, four hundred seventy-three thousand, four hundred twenty-one".