199081481 has 2 divisors, whose sum is σ = 199081482. Its totient is φ = 199081480.

The previous prime is 199081469. The next prime is 199081489. The reversal of 199081481 is 184180991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181575625 + 17505856 = 13475^2 + 4184^2 .

It is a cyclic number.

It is not a de Polignac number, because 199081481 - 2⁶ = 199081417 is a prime.

It is a super-2 number, since 2×199081481² = 79266872154306722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199081489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99540740 + 99540741.

It is an arithmetic number, because the mean of its divisors is an integer number (99540741).

Almost surely, 2^199081481 is an apocalyptic number.

It is an amenable number.

199081481 is a deficient number, since it is larger than the sum of its proper divisors (1).

199081481 is an equidigital number, since it uses as much as digits as its factorization.

199081481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 41.

The square root of 199081481 is about 14109.6237015733. The cubic root of 199081481 is about 583.9069183371.

The spelling of 199081481 in words is "one hundred ninety-nine million, eighty-one thousand, four hundred eighty-one".