209030161 has 2 divisors, whose sum is σ = 209030162. Its totient is φ = 209030160.

The previous prime is 209030149. The next prime is 209030183. The reversal of 209030161 is 161030902.

It is an a-pointer prime, because the next prime (209030183) can be obtained adding 209030161 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183467025 + 25563136 = 13545^2 + 5056^2 .

It is a cyclic number.

It is not a de Polignac number, because 209030161 - 2⁹ = 209029649 is a prime.

It is not a weakly prime, because it can be changed into another prime (209033161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104515080 + 104515081.

It is an arithmetic number, because the mean of its divisors is an integer number (104515081).

Almost surely, 2^209030161 is an apocalyptic number.

It is an amenable number.

209030161 is a deficient number, since it is larger than the sum of its proper divisors (1).

209030161 is an equidigital number, since it uses as much as digits as its factorization.

209030161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 209030161 is about 14457.8753971668. The cubic root of 209030161 is about 593.4757596548.

The spelling of 209030161 in words is "two hundred nine million, thirty thousand, one hundred sixty-one".