208242149 has 2 divisors, whose sum is σ = 208242150. Its totient is φ = 208242148.

The previous prime is 208242059. The next prime is 208242191. The reversal of 208242149 is 941242802.

It is a happy number.

208242149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125104225 + 83137924 = 11185^2 + 9118^2 .

It is a cyclic number.

It is not a de Polignac number, because 208242149 - 2²⁰ = 207193573 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 (208242049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104121074 + 104121075.

It is an arithmetic number, because the mean of its divisors is an integer number (104121075).

Almost surely, 2^208242149 is an apocalyptic number.

It is an amenable number.

208242149 is a deficient number, since it is larger than the sum of its proper divisors (1).

208242149 is an equidigital number, since it uses as much as digits as its factorization.

208242149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 208242149 is about 14430.5976660705. The cubic root of 208242149 is about 592.7290493417.

The spelling of 208242149 in words is "two hundred eight million, two hundred forty-two thousand, one hundred forty-nine".