126208189 has 2 divisors, whose sum is σ = 126208190. Its totient is φ = 126208188.

The previous prime is 126208169. The next prime is 126208213. The reversal of 126208189 is 981802621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66145689 + 60062500 = 8133^2 + 7750^2 .

It is an emirp because it is prime and its reverse (981802621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126208189 - 2¹¹ = 126206141 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 (126208169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63104094 + 63104095.

It is an arithmetic number, because the mean of its divisors is an integer number (63104095).

Almost surely, 2^126208189 is an apocalyptic number.

It is an amenable number.

126208189 is a deficient number, since it is larger than the sum of its proper divisors (1).

126208189 is an equidigital number, since it uses as much as digits as its factorization.

126208189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 126208189 is about 11234.2418079726. The cubic root of 126208189 is about 501.6057562400.

The spelling of 126208189 in words is "one hundred twenty-six million, two hundred eight thousand, one hundred eighty-nine".