207072109 has 2 divisors, whose sum is σ = 207072110. Its totient is φ = 207072108.

The previous prime is 207072097. The next prime is 207072149. The reversal of 207072109 is 901270702.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207072100 + 9 = 14390^2 + 3^2 .

It is a cyclic number.

It is not a de Polignac number, because 207072109 - 2¹⁵ = 207039341 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207072149) 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, 103536054 + 103536055.

It is an arithmetic number, because the mean of its divisors is an integer number (103536055).

Almost surely, 2^207072109 is an apocalyptic number.

It is an amenable number.

207072109 is a deficient number, since it is larger than the sum of its proper divisors (1).

207072109 is an equidigital number, since it uses as much as digits as its factorization.

207072109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 207072109 is about 14390.0003127172. Note that the first 3 decimals coincide. The cubic root of 207072109 is about 591.6168511212.

The spelling of 207072109 in words is "two hundred seven million, seventy-two thousand, one hundred nine".