199147 has 4 divisors (see below), whose sum is σ = 214480. Its totient is φ = 183816.

The previous prime is 199109. The next prime is 199151. The reversal of 199147 is 741991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199147 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199247) 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, 7647 + ... + 7672.

It is an arithmetic number, because the mean of its divisors is an integer number (53620).

2¹⁹⁹¹⁴⁷ is an apocalyptic number.

199147 is a deficient number, since it is larger than the sum of its proper divisors (15333).

199147 is a wasteful number, since it uses less digits than its factorization.

199147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15332.

The product of its digits is 2268, while the sum is 31.

The square root of 199147 is about 446.2588934688. The cubic root of 199147 is about 58.3970967156.

The spelling of 199147 in words is "one hundred ninety-nine thousand, one hundred forty-seven".