199000831 has 2 divisors, whose sum is σ = 199000832. Its totient is φ = 199000830.

The previous prime is 199000829. The next prime is 199000897. The reversal of 199000831 is 138000991.

It is a weak prime.

It is an emirp because it is prime and its reverse (138000991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199000831 - 2¹ = 199000829 is a prime.

It is a super-2 number, since 2×199000831² = 79202661477381122, which contains 22 as substring.

Together with 199000829, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 199000793 and 199000802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199000801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99500415 + 99500416.

It is an arithmetic number, because the mean of its divisors is an integer number (99500416).

Almost surely, 2^199000831 is an apocalyptic number.

199000831 is a deficient number, since it is larger than the sum of its proper divisors (1).

199000831 is an equidigital number, since it uses as much as digits as its factorization.

199000831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 199000831 is about 14106.7654336492. The cubic root of 199000831 is about 583.8280587443.

The spelling of 199000831 in words is "one hundred ninety-nine million, eight hundred thirty-one", and thus it is an aban number.