209795041 has 4 divisors (see below), whose sum is σ = 213753492. Its totient is φ = 205836592.

The previous prime is 209794999. The next prime is 209795051. The reversal of 209795041 is 140597902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 140597902 = 2 ⋅70298951.

It can be written as a sum of positive squares in 2 ways, for example, as 123676641 + 86118400 = 11121^2 + 9280^2 .

It is a cyclic number.

It is not a de Polignac number, because 209795041 - 2⁷ = 209794913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209795051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1979146 + ... + 1979251.

It is an arithmetic number, because the mean of its divisors is an integer number (53438373).

Almost surely, 2^209795041 is an apocalyptic number.

It is an amenable number.

209795041 is a deficient number, since it is larger than the sum of its proper divisors (3958451).

209795041 is an equidigital number, since it uses as much as digits as its factorization.

209795041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3958450.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 209795041 is about 14484.3032624976. The cubic root of 209795041 is about 594.1987576805.

The spelling of 209795041 in words is "two hundred nine million, seven hundred ninety-five thousand, forty-one".