199831847 has 2 divisors, whose sum is σ = 199831848. Its totient is φ = 199831846.

The previous prime is 199831831. The next prime is 199831897. The reversal of 199831847 is 748138991.

It is an a-pointer prime, because the next prime (199831897) can be obtained adding 199831847 to its sum of digits (50).

It is a weak prime.

It is an emirp because it is prime and its reverse (748138991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199831847 - 2⁴ = 199831831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199831795 and 199831804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199831897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99915923 + 99915924.

It is an arithmetic number, because the mean of its divisors is an integer number (99915924).

Almost surely, 2^199831847 is an apocalyptic number.

199831847 is a deficient number, since it is larger than the sum of its proper divisors (1).

199831847 is an equidigital number, since it uses as much as digits as its factorization.

199831847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 50.

The square root of 199831847 is about 14136.1892672672. The cubic root of 199831847 is about 584.6396075707.

The spelling of 199831847 in words is "one hundred ninety-nine million, eight hundred thirty-one thousand, eight hundred forty-seven".