199899461 has 2 divisors, whose sum is σ = 199899462. Its totient is φ = 199899460.

The previous prime is 199899449. The next prime is 199899473. The reversal of 199899461 is 164998991.

It is a balanced prime because it is at equal distance from previous prime (199899449) and next prime (199899473).

It can be written as a sum of positive squares in only one way, i.e., 177156100 + 22743361 = 13310^2 + 4769^2 .

It is a cyclic number.

It is not a de Polignac number, because 199899461 - 2²⁶ = 132790597 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 199899397 and 199899406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199899421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99949730 + 99949731.

It is an arithmetic number, because the mean of its divisors is an integer number (99949731).

Almost surely, 2^199899461 is an apocalyptic number.

It is an amenable number.

199899461 is a deficient number, since it is larger than the sum of its proper divisors (1).

199899461 is an equidigital number, since it uses as much as digits as its factorization.

199899461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 56.

The square root of 199899461 is about 14138.5805864662. The cubic root of 199899461 is about 584.7055386114.

The spelling of 199899461 in words is "one hundred ninety-nine million, eight hundred ninety-nine thousand, four hundred sixty-one".