209340037 has 2 divisors, whose sum is σ = 209340038. Its totient is φ = 209340036.

The previous prime is 209339971. The next prime is 209340041. The reversal of 209340037 is 730043902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121749156 + 87590881 = 11034^2 + 9359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209340037 is a prime.

It is a super-2 number, since 2×209340037² = 87646502182322738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 209339987 and 209340014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209340097) 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, 104670018 + 104670019.

It is an arithmetic number, because the mean of its divisors is an integer number (104670019).

Almost surely, 2^209340037 is an apocalyptic number.

It is an amenable number.

209340037 is a deficient number, since it is larger than the sum of its proper divisors (1).

209340037 is an equidigital number, since it uses as much as digits as its factorization.

209340037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 209340037 is about 14468.5879407771. The cubic root of 209340037 is about 593.7688801826.

Adding to 209340037 its reverse (730043902), we get a palindrome (939383939).

The spelling of 209340037 in words is "two hundred nine million, three hundred forty thousand, thirty-seven".