199841023 has 2 divisors, whose sum is σ = 199841024. Its totient is φ = 199841022.

The previous prime is 199841021. The next prime is 199841129. The reversal of 199841023 is 320148991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199841023 - 2¹ = 199841021 is a prime.

Together with 199841021, 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 (199841021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99920511 + 99920512.

It is an arithmetic number, because the mean of its divisors is an integer number (99920512).

Almost surely, 2^199841023 is an apocalyptic number.

199841023 is a deficient number, since it is larger than the sum of its proper divisors (1).

199841023 is an equidigital number, since it uses as much as digits as its factorization.

199841023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 199841023 is about 14136.5138205995. The cubic root of 199841023 is about 584.6485560458.

The spelling of 199841023 in words is "one hundred ninety-nine million, eight hundred forty-one thousand, twenty-three".