199592681 has 2 divisors, whose sum is σ = 199592682. Its totient is φ = 199592680.

The previous prime is 199592651. The next prime is 199592711. The reversal of 199592681 is 186295991.

It is a balanced prime because it is at equal distance from previous prime (199592651) and next prime (199592711).

It can be written as a sum of positive squares in only one way, i.e., 196981225 + 2611456 = 14035^2 + 1616^2 .

It is a cyclic number.

It is not a de Polignac number, because 199592681 - 2¹⁴ = 199576297 is a prime.

It is a super-2 number, since 2×199592681² = 79674476617535522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (199592611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99796340 + 99796341.

It is an arithmetic number, because the mean of its divisors is an integer number (99796341).

Almost surely, 2^199592681 is an apocalyptic number.

It is an amenable number.

199592681 is a deficient number, since it is larger than the sum of its proper divisors (1).

199592681 is an equidigital number, since it uses as much as digits as its factorization.

199592681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 50.

The square root of 199592681 is about 14127.7273827038. The cubic root of 199592681 is about 584.4062751656.

The spelling of 199592681 in words is "one hundred ninety-nine million, five hundred ninety-two thousand, six hundred eighty-one".