199493471 has 2 divisors, whose sum is σ = 199493472. Its totient is φ = 199493470.

The previous prime is 199493417. The next prime is 199493473. The reversal of 199493471 is 174394991.

Together with previous prime (199493417) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (174394991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199493471 - 2¹⁴ = 199477087 is a prime.

It is a super-3 number, since 3×199493471³ (a number of 26 digits) contains 333 as substring.

Together with 199493473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199493473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99746735 + 99746736.

It is an arithmetic number, because the mean of its divisors is an integer number (99746736).

Almost surely, 2^199493471 is an apocalyptic number.

199493471 is a deficient number, since it is larger than the sum of its proper divisors (1).

199493471 is an equidigital number, since it uses as much as digits as its factorization.

199493471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The square root of 199493471 is about 14124.2157658399. The cubic root of 199493471 is about 584.3094303393.

The spelling of 199493471 in words is "one hundred ninety-nine million, four hundred ninety-three thousand, four hundred seventy-one".