209340041 has 2 divisors, whose sum is σ = 209340042. Its totient is φ = 209340040.

The previous prime is 209340037. The next prime is 209340073. The reversal of 209340041 is 140043902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200364025 + 8976016 = 14155^2 + 2996^2 .

It is a cyclic number.

It is not a de Polignac number, because 209340041 - 2² = 209340037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209339989 and 209340016.

It is not a weakly prime, because it can be changed into another prime (209340541) 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 as a sum of consecutive naturals, namely, 104670020 + 104670021.

It is an arithmetic number, because the mean of its divisors is an integer number (104670021).

Almost surely, 2^209340041 is an apocalyptic number.

It is an amenable number.

209340041 is a deficient number, since it is larger than the sum of its proper divisors (1).

209340041 is an equidigital number, since it uses as much as digits as its factorization.

209340041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 209340041 is about 14468.5880790076. The cubic root of 209340041 is about 593.7688839645.

Adding to 209340041 its reverse (140043902), we get a palindrome (349383943).

The spelling of 209340041 in words is "two hundred nine million, three hundred forty thousand, forty-one".