207090161 has 2 divisors, whose sum is σ = 207090162. Its totient is φ = 207090160.

The previous prime is 207090157. The next prime is 207090223. The reversal of 207090161 is 161090702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197824225 + 9265936 = 14065^2 + 3044^2 .

It is a cyclic number.

It is not a de Polignac number, because 207090161 - 2² = 207090157 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 207090161.

It is not a weakly prime, because it can be changed into another prime (207090151) 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, 103545080 + 103545081.

It is an arithmetic number, because the mean of its divisors is an integer number (103545081).

Almost surely, 2^207090161 is an apocalyptic number.

It is an amenable number.

207090161 is a deficient number, since it is larger than the sum of its proper divisors (1).

207090161 is an equidigital number, since it uses as much as digits as its factorization.

207090161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 207090161 is about 14390.6275401735. The cubic root of 207090161 is about 591.6340424869.

The spelling of 207090161 in words is "two hundred seven million, ninety thousand, one hundred sixty-one".