199493247 has 4 divisors (see below), whose sum is σ = 265991000. Its totient is φ = 132995496.

The previous prime is 199493243. The next prime is 199493257. The reversal of 199493247 is 742394991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 199493247 - 2² = 199493243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199493196 and 199493205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199493243) 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, 33248872 + ... + 33248877.

It is an arithmetic number, because the mean of its divisors is an integer number (66497750).

Almost surely, 2^199493247 is an apocalyptic number.

199493247 is a deficient number, since it is larger than the sum of its proper divisors (66497753).

199493247 is an equidigital number, since it uses as much as digits as its factorization.

199493247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66497752.

The product of its digits is 489888, while the sum is 48.

The square root of 199493247 is about 14124.2078361939. The cubic root of 199493247 is about 584.3092116431.

The spelling of 199493247 in words is "one hundred ninety-nine million, four hundred ninety-three thousand, two hundred forty-seven".