199803101 has 2 divisors, whose sum is σ = 199803102. Its totient is φ = 199803100.

The previous prime is 199803077. The next prime is 199803103. The reversal of 199803101 is 101308991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141586201 + 58216900 = 11899^2 + 7630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199803101 is a prime.

Together with 199803103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199803103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99901550 + 99901551.

It is an arithmetic number, because the mean of its divisors is an integer number (99901551).

Almost surely, 2^199803101 is an apocalyptic number.

It is an amenable number.

199803101 is a deficient number, since it is larger than the sum of its proper divisors (1).

199803101 is an equidigital number, since it uses as much as digits as its factorization.

199803101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 199803101 is about 14135.1724786081. The cubic root of 199803101 is about 584.6115725731.

The spelling of 199803101 in words is "one hundred ninety-nine million, eight hundred three thousand, one hundred one".