199849073 has 2 divisors, whose sum is σ = 199849074. Its totient is φ = 199849072.

The previous prime is 199849037. The next prime is 199849109. The reversal of 199849073 is 370948991.

Together with previous prime (199849037) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (199849037) and next prime (199849109).

It can be written as a sum of positive squares in only one way, i.e., 197908624 + 1940449 = 14068^2 + 1393^2 .

It is a cyclic number.

It is not a de Polignac number, because 199849073 - 2¹⁸ = 199586929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (199849673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99924536 + 99924537.

It is an arithmetic number, because the mean of its divisors is an integer number (99924537).

Almost surely, 2^199849073 is an apocalyptic number.

It is an amenable number.

199849073 is a deficient number, since it is larger than the sum of its proper divisors (1).

199849073 is an equidigital number, since it uses as much as digits as its factorization.

199849073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 199849073 is about 14136.7985413954. The cubic root of 199849073 is about 584.6564062153.

The spelling of 199849073 in words is "one hundred ninety-nine million, eight hundred forty-nine thousand, seventy-three".