199983031 has 2 divisors, whose sum is σ = 199983032. Its totient is φ = 199983030.

The previous prime is 199983029. The next prime is 199983061. The reversal of 199983031 is 130389991.

It is a weak prime.

It is an emirp because it is prime and its reverse (130389991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199983031 - 2¹ = 199983029 is a prime.

It is a super-2 number, since 2×199983031² = 79986425375893922, which contains 22 as substring.

Together with 199983029, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199983061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99991515 + 99991516.

It is an arithmetic number, because the mean of its divisors is an integer number (99991516).

Almost surely, 2^199983031 is an apocalyptic number.

199983031 is a deficient number, since it is larger than the sum of its proper divisors (1).

199983031 is an equidigital number, since it uses as much as digits as its factorization.

199983031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 199983031 is about 14141.5356662563. The cubic root of 199983031 is about 584.7870079558.

The spelling of 199983031 in words is "one hundred ninety-nine million, nine hundred eighty-three thousand, thirty-one".