199802093 has 2 divisors, whose sum is σ = 199802094. Its totient is φ = 199802092.

The previous prime is 199802089. The next prime is 199802101. The reversal of 199802093 is 390208991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167391844 + 32410249 = 12938^2 + 5693^2 .

It is a cyclic number.

It is not a de Polignac number, because 199802093 - 2² = 199802089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 199802093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199802293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99901046 + 99901047.

It is an arithmetic number, because the mean of its divisors is an integer number (99901047).

Almost surely, 2^199802093 is an apocalyptic number.

It is an amenable number.

199802093 is a deficient number, since it is larger than the sum of its proper divisors (1).

199802093 is an equidigital number, since it uses as much as digits as its factorization.

199802093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 199802093 is about 14135.1368228256. The cubic root of 199802093 is about 584.6105894561.

The spelling of 199802093 in words is "one hundred ninety-nine million, eight hundred two thousand, ninety-three".